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Finding the Fourth Proportional to 99,462.91, 137,261.91 and 54,143.91

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Solution

The fourth proportional to 99,462.91, 137,261.91 and 54,143.91 is: 74,720.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,462.91 : 137,261.91 = 54,143.91 : x
  2. Step 2: Convert to fraction form
    99,462.91/137,261.91 = 54,143.91/x
  3. Step 3: Cross multiply
    99,462.91x = 137,261.91 × 54,143.91
  4. Step 4: Simplify right side
    99,462.91x = 7,431,896,501.47
  5. Step 5: Solve for x
    x = 7,431,896,501.47/99,462.91
  6. Step 6: Final answer
    x = 74,720.28

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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.