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Finding the Fourth Proportional to 91,712.65, 137,404.95 and 56,611.30

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Solution

The fourth proportional to 91,712.65, 137,404.95 and 56,611.30 is: 84,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,712.65 : 137,404.95 = 56,611.30 : x
  2. Step 2: Convert to fraction form
    91,712.65/137,404.95 = 56,611.30/x
  3. Step 3: Cross multiply
    91,712.65x = 137,404.95 × 56,611.30
  4. Step 4: Simplify right side
    91,712.65x = 7,778,672,845.94
  5. Step 5: Solve for x
    x = 7,778,672,845.94/91,712.65
  6. Step 6: Final answer
    x = 84,815.70

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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.