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Finding the Fourth Proportional to 99,432.57, 137,215.50 and 54,720.57

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Solution

The fourth proportional to 99,432.57, 137,215.50 and 54,720.57 is: 75,513.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,432.57 : 137,215.50 = 54,720.57 : x
  2. Step 2: Convert to fraction form
    99,432.57/137,215.50 = 54,720.57/x
  3. Step 3: Cross multiply
    99,432.57x = 137,215.50 × 54,720.57
  4. Step 4: Simplify right side
    99,432.57x = 7,508,509,686.76
  5. Step 5: Solve for x
    x = 7,508,509,686.76/99,432.57
  6. Step 6: Final answer
    x = 75,513.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.