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Finding the Fourth Proportional to 99,860.57, 137,808.53 and 56,837.96

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Solution

The fourth proportional to 99,860.57, 137,808.53 and 56,837.96 is: 78,436.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,860.57 : 137,808.53 = 56,837.96 : x
  2. Step 2: Convert to fraction form
    99,860.57/137,808.53 = 56,837.96/x
  3. Step 3: Cross multiply
    99,860.57x = 137,808.53 × 56,837.96
  4. Step 4: Simplify right side
    99,860.57x = 7,832,755,431.61
  5. Step 5: Solve for x
    x = 7,832,755,431.61/99,860.57
  6. Step 6: Final answer
    x = 78,436.92

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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.