Home / 128,943.20-177,937.44-72,355.52

Finding the Fourth Proportional to 128,943.20, 177,937.44 and 72,355.52

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Solution

The fourth proportional to 128,943.20, 177,937.44 and 72,355.52 is: 99,848.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,943.20 : 177,937.44 = 72,355.52 : x
  2. Step 2: Convert to fraction form
    128,943.20/177,937.44 = 72,355.52/x
  3. Step 3: Cross multiply
    128,943.20x = 177,937.44 × 72,355.52
  4. Step 4: Simplify right side
    128,943.20x = 12,874,755,998.67
  5. Step 5: Solve for x
    x = 12,874,755,998.67/128,943.20
  6. Step 6: Final answer
    x = 99,848.27

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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.