Home / 128,942.55-177,933.92-72,352.71

Finding the Fourth Proportional to 128,942.55, 177,933.92 and 72,352.71

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Solution

The fourth proportional to 128,942.55, 177,933.92 and 72,352.71 is: 99,842.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,942.55 : 177,933.92 = 72,352.71 : x
  2. Step 2: Convert to fraction form
    128,942.55/177,933.92 = 72,352.71/x
  3. Step 3: Cross multiply
    128,942.55x = 177,933.92 × 72,352.71
  4. Step 4: Simplify right side
    128,942.55x = 12,874,000,951.16
  5. Step 5: Solve for x
    x = 12,874,000,951.16/128,942.55
  6. Step 6: Final answer
    x = 99,842.92

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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.