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Finding the Fourth Proportional to 100,377.52, 138,520.94 and 55,665.52

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Solution

The fourth proportional to 100,377.52, 138,520.94 and 55,665.52 is: 76,818.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,377.52 : 138,520.94 = 55,665.52 : x
  2. Step 2: Convert to fraction form
    100,377.52/138,520.94 = 55,665.52/x
  3. Step 3: Cross multiply
    100,377.52x = 138,520.94 × 55,665.52
  4. Step 4: Simplify right side
    100,377.52x = 7,710,840,155.99
  5. Step 5: Solve for x
    x = 7,710,840,155.99/100,377.52
  6. Step 6: Final answer
    x = 76,818.40

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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.