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Finding the Fourth Proportional to 99,612.78, 137,463.84 and 54,291.18

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Solution

The fourth proportional to 99,612.78, 137,463.84 and 54,291.18 is: 74,920.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,612.78 : 137,463.84 = 54,291.18 : x
  2. Step 2: Convert to fraction form
    99,612.78/137,463.84 = 54,291.18/x
  3. Step 3: Cross multiply
    99,612.78x = 137,463.84 × 54,291.18
  4. Step 4: Simplify right side
    99,612.78x = 7,463,074,080.93
  5. Step 5: Solve for x
    x = 7,463,074,080.93/99,612.78
  6. Step 6: Final answer
    x = 74,920.85

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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.