Home / 128,849.30-177,811.68-72,261.88

Finding the Fourth Proportional to 128,849.30, 177,811.68 and 72,261.88

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Solution

The fourth proportional to 128,849.30, 177,811.68 and 72,261.88 is: 99,721.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,849.30 : 177,811.68 = 72,261.88 : x
  2. Step 2: Convert to fraction form
    128,849.30/177,811.68 = 72,261.88/x
  3. Step 3: Cross multiply
    128,849.30x = 177,811.68 × 72,261.88
  4. Step 4: Simplify right side
    128,849.30x = 12,849,006,282.76
  5. Step 5: Solve for x
    x = 12,849,006,282.76/128,849.30
  6. Step 6: Final answer
    x = 99,721.20

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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.