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Finding the Fourth Proportional to 85,371.14, 117,798.09 and 47,645.30

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Solution

The fourth proportional to 85,371.14, 117,798.09 and 47,645.30 is: 65,742.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,371.14 : 117,798.09 = 47,645.30 : x
  2. Step 2: Convert to fraction form
    85,371.14/117,798.09 = 47,645.30/x
  3. Step 3: Cross multiply
    85,371.14x = 117,798.09 × 47,645.30
  4. Step 4: Simplify right side
    85,371.14x = 5,612,525,337.48
  5. Step 5: Solve for x
    x = 5,612,525,337.48/85,371.14
  6. Step 6: Final answer
    x = 65,742.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.