Home / 128,340.52-177,106.98-71,757.16

Finding the Fourth Proportional to 128,340.52, 177,106.98 and 71,757.16

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Solution

The fourth proportional to 128,340.52, 177,106.98 and 71,757.16 is: 99,023.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,340.52 : 177,106.98 = 71,757.16 : x
  2. Step 2: Convert to fraction form
    128,340.52/177,106.98 = 71,757.16/x
  3. Step 3: Cross multiply
    128,340.52x = 177,106.98 × 71,757.16
  4. Step 4: Simplify right side
    128,340.52x = 12,708,693,900.98
  5. Step 5: Solve for x
    x = 12,708,693,900.98/128,340.52
  6. Step 6: Final answer
    x = 99,023.24

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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.