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Finding the Fourth Proportional to 66,407.90, 91,640.22 and 36,192.57

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Solution

The fourth proportional to 66,407.90, 91,640.22 and 36,192.57 is: 49,944.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,407.90 : 91,640.22 = 36,192.57 : x
  2. Step 2: Convert to fraction form
    66,407.90/91,640.22 = 36,192.57/x
  3. Step 3: Cross multiply
    66,407.90x = 91,640.22 × 36,192.57
  4. Step 4: Simplify right side
    66,407.90x = 3,316,695,059.11
  5. Step 5: Solve for x
    x = 3,316,695,059.11/66,407.90
  6. Step 6: Final answer
    x = 49,944.29

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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.