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Finding the Fourth Proportional to 91,599.86, 137,398.70 and 51,621.86

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Solution

The fourth proportional to 91,599.86, 137,398.70 and 51,621.86 is: 77,432.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,599.86 : 137,398.70 = 51,621.86 : x
  2. Step 2: Convert to fraction form
    91,599.86/137,398.70 = 51,621.86/x
  3. Step 3: Cross multiply
    91,599.86x = 137,398.70 × 51,621.86
  4. Step 4: Simplify right side
    91,599.86x = 7,092,776,455.58
  5. Step 5: Solve for x
    x = 7,092,776,455.58/91,599.86
  6. Step 6: Final answer
    x = 77,432.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.