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Finding the Fourth Proportional to 66,513.71, 91,800.75 and 39,657.92

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Solution

The fourth proportional to 66,513.71, 91,800.75 and 39,657.92 is: 54,734.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,513.71 : 91,800.75 = 39,657.92 : x
  2. Step 2: Convert to fraction form
    66,513.71/91,800.75 = 39,657.92/x
  3. Step 3: Cross multiply
    66,513.71x = 91,800.75 × 39,657.92
  4. Step 4: Simplify right side
    66,513.71x = 3,640,626,799.44
  5. Step 5: Solve for x
    x = 3,640,626,799.44/66,513.71
  6. Step 6: Final answer
    x = 54,734.98

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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.