Home / 128,944.20-177,938.82-72,356.52

Finding the Fourth Proportional to 128,944.20, 177,938.82 and 72,356.52

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Solution

The fourth proportional to 128,944.20, 177,938.82 and 72,356.52 is: 99,849.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,944.20 : 177,938.82 = 72,356.52 : x
  2. Step 2: Convert to fraction form
    128,944.20/177,938.82 = 72,356.52/x
  3. Step 3: Cross multiply
    128,944.20x = 177,938.82 × 72,356.52
  4. Step 4: Simplify right side
    128,944.20x = 12,875,033,788.11
  5. Step 5: Solve for x
    x = 12,875,033,788.11/128,944.20
  6. Step 6: Final answer
    x = 99,849.65

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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.