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Finding the Fourth Proportional to 145,636.57, 218,539.77 and 61,391.57

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Solution

The fourth proportional to 145,636.57, 218,539.77 and 61,391.57 is: 92,123.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,636.57 : 218,539.77 = 61,391.57 : x
  2. Step 2: Convert to fraction form
    145,636.57/218,539.77 = 61,391.57/x
  3. Step 3: Cross multiply
    145,636.57x = 218,539.77 × 61,391.57
  4. Step 4: Simplify right side
    145,636.57x = 13,416,499,280.78
  5. Step 5: Solve for x
    x = 13,416,499,280.78/145,636.57
  6. Step 6: Final answer
    x = 92,123.15

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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.