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Finding the Fourth Proportional to 66,002.64, 91,046.88 and 39,119.28

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Solution

The fourth proportional to 66,002.64, 91,046.88 and 39,119.28 is: 53,962.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,002.64 : 91,046.88 = 39,119.28 : x
  2. Step 2: Convert to fraction form
    66,002.64/91,046.88 = 39,119.28/x
  3. Step 3: Cross multiply
    66,002.64x = 91,046.88 × 39,119.28
  4. Step 4: Simplify right side
    66,002.64x = 3,561,688,391.85
  5. Step 5: Solve for x
    x = 3,561,688,391.85/66,002.64
  6. Step 6: Final answer
    x = 53,962.82

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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.