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Finding the Fourth Proportional to 91,536.60, 136,925.78 and 85,937.88

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Solution

The fourth proportional to 91,536.60, 136,925.78 and 85,937.88 is: 128,550.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,536.60 : 136,925.78 = 85,937.88 : x
  2. Step 2: Convert to fraction form
    91,536.60/136,925.78 = 85,937.88/x
  3. Step 3: Cross multiply
    91,536.60x = 136,925.78 × 85,937.88
  4. Step 4: Simplify right side
    91,536.60x = 11,767,111,250.55
  5. Step 5: Solve for x
    x = 11,767,111,250.55/91,536.60
  6. Step 6: Final answer
    x = 128,550.89

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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.