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Finding the Fourth Proportional to 91,589.60, 137,384.40 and 39,000.80

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Solution

The fourth proportional to 91,589.60, 137,384.40 and 39,000.80 is: 58,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,589.60 : 137,384.40 = 39,000.80 : x
  2. Step 2: Convert to fraction form
    91,589.60/137,384.40 = 39,000.80/x
  3. Step 3: Cross multiply
    91,589.60x = 137,384.40 × 39,000.80
  4. Step 4: Simplify right side
    91,589.60x = 5,358,101,507.52
  5. Step 5: Solve for x
    x = 5,358,101,507.52/91,589.60
  6. Step 6: Final answer
    x = 58,501.20

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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.