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Finding the Fourth Proportional to 85,388.85, 117,838.49 and 47,148.30

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Solution

The fourth proportional to 85,388.85, 117,838.49 and 47,148.30 is: 65,065.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,388.85 : 117,838.49 = 47,148.30 : x
  2. Step 2: Convert to fraction form
    85,388.85/117,838.49 = 47,148.30/x
  3. Step 3: Cross multiply
    85,388.85x = 117,838.49 × 47,148.30
  4. Step 4: Simplify right side
    85,388.85x = 5,555,884,478.07
  5. Step 5: Solve for x
    x = 5,555,884,478.07/85,388.85
  6. Step 6: Final answer
    x = 65,065.69

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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.