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Finding the Fourth Proportional to 66,614.64, 91,930.88 and 38,320.32

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Solution

The fourth proportional to 66,614.64, 91,930.88 and 38,320.32 is: 52,883.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,614.64 : 91,930.88 = 38,320.32 : x
  2. Step 2: Convert to fraction form
    66,614.64/91,930.88 = 38,320.32/x
  3. Step 3: Cross multiply
    66,614.64x = 91,930.88 × 38,320.32
  4. Step 4: Simplify right side
    66,614.64x = 3,522,820,739.48
  5. Step 5: Solve for x
    x = 3,522,820,739.48/66,614.64
  6. Step 6: Final answer
    x = 52,883.58

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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.