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Finding the Fourth Proportional to 85,368.90, 117,809.14 and 47,643.14

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Solution

The fourth proportional to 85,368.90, 117,809.14 and 47,643.14 is: 65,747.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,368.90 : 117,809.14 = 47,643.14 : x
  2. Step 2: Convert to fraction form
    85,368.90/117,809.14 = 47,643.14/x
  3. Step 3: Cross multiply
    85,368.90x = 117,809.14 × 47,643.14
  4. Step 4: Simplify right side
    85,368.90x = 5,612,797,350.30
  5. Step 5: Solve for x
    x = 5,612,797,350.30/85,368.90
  6. Step 6: Final answer
    x = 65,747.57

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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.