Home / 128,431.17-177,404.46-98,585.31

Finding the Fourth Proportional to 128,431.17, 177,404.46 and 98,585.31

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Solution

The fourth proportional to 128,431.17, 177,404.46 and 98,585.31 is: 136,177.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,431.17 : 177,404.46 = 98,585.31 : x
  2. Step 2: Convert to fraction form
    128,431.17/177,404.46 = 98,585.31/x
  3. Step 3: Cross multiply
    128,431.17x = 177,404.46 × 98,585.31
  4. Step 4: Simplify right side
    128,431.17x = 17,489,473,684.48
  5. Step 5: Solve for x
    x = 17,489,473,684.48/128,431.17
  6. Step 6: Final answer
    x = 136,177.80

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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.