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Finding the Fourth Proportional to 91,814.80, 137,614.20 and 52,409.20

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Solution

The fourth proportional to 91,814.80, 137,614.20 and 52,409.20 is: 78,552.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,814.80 : 137,614.20 = 52,409.20 : x
  2. Step 2: Convert to fraction form
    91,814.80/137,614.20 = 52,409.20/x
  3. Step 3: Cross multiply
    91,814.80x = 137,614.20 × 52,409.20
  4. Step 4: Simplify right side
    91,814.80x = 7,212,250,130.64
  5. Step 5: Solve for x
    x = 7,212,250,130.64/91,814.80
  6. Step 6: Final answer
    x = 78,552.15

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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.