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Finding the Fourth Proportional to 136,613.90, 204,920.85 and 77,564.90

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Solution

The fourth proportional to 136,613.90, 204,920.85 and 77,564.90 is: 116,347.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,613.90 : 204,920.85 = 77,564.90 : x
  2. Step 2: Convert to fraction form
    136,613.90/204,920.85 = 77,564.90/x
  3. Step 3: Cross multiply
    136,613.90x = 204,920.85 × 77,564.90
  4. Step 4: Simplify right side
    136,613.90x = 15,894,665,238.17
  5. Step 5: Solve for x
    x = 15,894,665,238.17/136,613.90
  6. Step 6: Final answer
    x = 116,347.35

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1.5x scale

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.