Home / 128,867.04-177,836.08-72,278.24

Finding the Fourth Proportional to 128,867.04, 177,836.08 and 72,278.24

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Solution

The fourth proportional to 128,867.04, 177,836.08 and 72,278.24 is: 99,743.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,867.04 : 177,836.08 = 72,278.24 : x
  2. Step 2: Convert to fraction form
    128,867.04/177,836.08 = 72,278.24/x
  3. Step 3: Cross multiply
    128,867.04x = 177,836.08 × 72,278.24
  4. Step 4: Simplify right side
    128,867.04x = 12,853,678,870.90
  5. Step 5: Solve for x
    x = 12,853,678,870.90/128,867.04
  6. Step 6: Final answer
    x = 99,743.73

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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.