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Finding the Fourth Proportional to 91,486.96, 137,387.49 and 56,155.75

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Solution

The fourth proportional to 91,486.96, 137,387.49 and 56,155.75 is: 84,330.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,486.96 : 137,387.49 = 56,155.75 : x
  2. Step 2: Convert to fraction form
    91,486.96/137,387.49 = 56,155.75/x
  3. Step 3: Cross multiply
    91,486.96x = 137,387.49 × 56,155.75
  4. Step 4: Simplify right side
    91,486.96x = 7,715,097,541.57
  5. Step 5: Solve for x
    x = 7,715,097,541.57/91,486.96
  6. Step 6: Final answer
    x = 84,330.02

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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.