Home / 128,516.17-177,352.30-71,927.55

Finding the Fourth Proportional to 128,516.17, 177,352.30 and 71,927.55

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Solution

The fourth proportional to 128,516.17, 177,352.30 and 71,927.55 is: 99,260.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,516.17 : 177,352.30 = 71,927.55 : x
  2. Step 2: Convert to fraction form
    128,516.17/177,352.30 = 71,927.55/x
  3. Step 3: Cross multiply
    128,516.17x = 177,352.30 × 71,927.55
  4. Step 4: Simplify right side
    128,516.17x = 12,756,516,425.87
  5. Step 5: Solve for x
    x = 12,756,516,425.87/128,516.17
  6. Step 6: Final answer
    x = 99,260.01

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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.