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Finding the Fourth Proportional to 78,598.65, 117,861.89 and 25,280.81

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Solution

The fourth proportional to 78,598.65, 117,861.89 and 25,280.81 is: 37,909.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,598.65 : 117,861.89 = 25,280.81 : x
  2. Step 2: Convert to fraction form
    78,598.65/117,861.89 = 25,280.81/x
  3. Step 3: Cross multiply
    78,598.65x = 117,861.89 × 25,280.81
  4. Step 4: Simplify right side
    78,598.65x = 2,979,643,773.60
  5. Step 5: Solve for x
    x = 2,979,643,773.60/78,598.65
  6. Step 6: Final answer
    x = 37,909.60

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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.