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Finding the Fourth Proportional to 99,463.79, 137,261.78 and 54,143.07

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Solution

The fourth proportional to 99,463.79, 137,261.78 and 54,143.07 is: 74,718.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,463.79 : 137,261.78 = 54,143.07 : x
  2. Step 2: Convert to fraction form
    99,463.79/137,261.78 = 54,143.07/x
  3. Step 3: Cross multiply
    99,463.79x = 137,261.78 × 54,143.07
  4. Step 4: Simplify right side
    99,463.79x = 7,431,773,892.15
  5. Step 5: Solve for x
    x = 7,431,773,892.15/99,463.79
  6. Step 6: Final answer
    x = 74,718.39

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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.