Home / 128,341.52-177,108.36-71,758.16

Finding the Fourth Proportional to 128,341.52, 177,108.36 and 71,758.16

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Solution

The fourth proportional to 128,341.52, 177,108.36 and 71,758.16 is: 99,024.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,341.52 : 177,108.36 = 71,758.16 : x
  2. Step 2: Convert to fraction form
    128,341.52/177,108.36 = 71,758.16/x
  3. Step 3: Cross multiply
    128,341.52x = 177,108.36 × 71,758.16
  4. Step 4: Simplify right side
    128,341.52x = 12,708,970,034.22
  5. Step 5: Solve for x
    x = 12,708,970,034.22/128,341.52
  6. Step 6: Final answer
    x = 99,024.62

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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.