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Finding the Fourth Proportional to 115,717.71, 159,404.85 and 98,666.40

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Solution

The fourth proportional to 115,717.71, 159,404.85 and 98,666.40 is: 135,916.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,717.71 : 159,404.85 = 98,666.40 : x
  2. Step 2: Convert to fraction form
    115,717.71/159,404.85 = 98,666.40/x
  3. Step 3: Cross multiply
    115,717.71x = 159,404.85 × 98,666.40
  4. Step 4: Simplify right side
    115,717.71x = 15,727,902,692.04
  5. Step 5: Solve for x
    x = 15,727,902,692.04/115,717.71
  6. Step 6: Final answer
    x = 135,916.12

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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.