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Finding the Fourth Proportional to 91,587.68, 127,037.60 and 89,159.84

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Solution

The fourth proportional to 91,587.68, 127,037.60 and 89,159.84 is: 123,670.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,587.68 : 127,037.60 = 89,159.84 : x
  2. Step 2: Convert to fraction form
    91,587.68/127,037.60 = 89,159.84/x
  3. Step 3: Cross multiply
    91,587.68x = 127,037.60 × 89,159.84
  4. Step 4: Simplify right side
    91,587.68x = 11,326,652,089.98
  5. Step 5: Solve for x
    x = 11,326,652,089.98/91,587.68
  6. Step 6: Final answer
    x = 123,670.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.