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Finding the Fourth Proportional to 157,655.17, 217,568.72 and 86,039.81

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Solution

The fourth proportional to 157,655.17, 217,568.72 and 86,039.81 is: 118,737.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,655.17 : 217,568.72 = 86,039.81 : x
  2. Step 2: Convert to fraction form
    157,655.17/217,568.72 = 86,039.81/x
  3. Step 3: Cross multiply
    157,655.17x = 217,568.72 × 86,039.81
  4. Step 4: Simplify right side
    157,655.17x = 18,719,569,812.70
  5. Step 5: Solve for x
    x = 18,719,569,812.70/157,655.17
  6. Step 6: Final answer
    x = 118,737.43

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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.