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Finding the Fourth Proportional to 145,640.88, 218,399.52 and 61,438.80

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Solution

The fourth proportional to 145,640.88, 218,399.52 and 61,438.80 is: 92,132.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,640.88 : 218,399.52 = 61,438.80 : x
  2. Step 2: Convert to fraction form
    145,640.88/218,399.52 = 61,438.80/x
  3. Step 3: Cross multiply
    145,640.88x = 218,399.52 × 61,438.80
  4. Step 4: Simplify right side
    145,640.88x = 13,418,204,429.38
  5. Step 5: Solve for x
    x = 13,418,204,429.38/145,640.88
  6. Step 6: Final answer
    x = 92,132.13

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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.