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Finding the Fourth Proportional to 138,624.72, 191,301.60 and 74,962.32

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Solution

The fourth proportional to 138,624.72, 191,301.60 and 74,962.32 is: 103,447.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,624.72 : 191,301.60 = 74,962.32 : x
  2. Step 2: Convert to fraction form
    138,624.72/191,301.60 = 74,962.32/x
  3. Step 3: Cross multiply
    138,624.72x = 191,301.60 × 74,962.32
  4. Step 4: Simplify right side
    138,624.72x = 14,340,411,755.71
  5. Step 5: Solve for x
    x = 14,340,411,755.71/138,624.72
  6. Step 6: Final answer
    x = 103,447.72

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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.