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Finding the Fourth Proportional to 118,025.70, 176,606.55 and 86,921.70

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Solution

The fourth proportional to 118,025.70, 176,606.55 and 86,921.70 is: 130,064.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,025.70 : 176,606.55 = 86,921.70 : x
  2. Step 2: Convert to fraction form
    118,025.70/176,606.55 = 86,921.70/x
  3. Step 3: Cross multiply
    118,025.70x = 176,606.55 × 86,921.70
  4. Step 4: Simplify right side
    118,025.70x = 15,350,941,557.14
  5. Step 5: Solve for x
    x = 15,350,941,557.14/118,025.70
  6. Step 6: Final answer
    x = 130,064.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.