Home / 72,781.20-100,384.28-50,127.36

Finding the Fourth Proportional to 72,781.20, 100,384.28 and 50,127.36

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Solution

The fourth proportional to 72,781.20, 100,384.28 and 50,127.36 is: 69,138.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,781.20 : 100,384.28 = 50,127.36 : x
  2. Step 2: Convert to fraction form
    72,781.20/100,384.28 = 50,127.36/x
  3. Step 3: Cross multiply
    72,781.20x = 100,384.28 × 50,127.36
  4. Step 4: Simplify right side
    72,781.20x = 5,031,998,941.90
  5. Step 5: Solve for x
    x = 5,031,998,941.90/72,781.20
  6. Step 6: Final answer
    x = 69,138.72

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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.