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Finding the Fourth Proportional to 99,132, 136,800.54 and 56,689.08

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Solution

The fourth proportional to 99,132, 136,800.54 and 56,689.08 is: 78,230.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,132 : 136,800.54 = 56,689.08 : x
  2. Step 2: Convert to fraction form
    99,132/136,800.54 = 56,689.08/x
  3. Step 3: Cross multiply
    99,132x = 136,800.54 × 56,689.08
  4. Step 4: Simplify right side
    99,132x = 7,755,096,756.10
  5. Step 5: Solve for x
    x = 7,755,096,756.10/99,132
  6. Step 6: Final answer
    x = 78,230.00

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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.