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Finding the Fourth Proportional to 127,543.52, 175,977.42 and 87,269.78

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Solution

The fourth proportional to 127,543.52, 175,977.42 and 87,269.78 is: 120,409.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,543.52 : 175,977.42 = 87,269.78 : x
  2. Step 2: Convert to fraction form
    127,543.52/175,977.42 = 87,269.78/x
  3. Step 3: Cross multiply
    127,543.52x = 175,977.42 × 87,269.78
  4. Step 4: Simplify right side
    127,543.52x = 15,357,510,728.37
  5. Step 5: Solve for x
    x = 15,357,510,728.37/127,543.52
  6. Step 6: Final answer
    x = 120,409.96

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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.