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Finding the Fourth Proportional to 91,206.60, 136,809.90 and 59,713.80

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Solution

The fourth proportional to 91,206.60, 136,809.90 and 59,713.80 is: 89,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,206.60 : 136,809.90 = 59,713.80 : x
  2. Step 2: Convert to fraction form
    91,206.60/136,809.90 = 59,713.80/x
  3. Step 3: Cross multiply
    91,206.60x = 136,809.90 × 59,713.80
  4. Step 4: Simplify right side
    91,206.60x = 8,169,439,006.62
  5. Step 5: Solve for x
    x = 8,169,439,006.62/91,206.60
  6. Step 6: Final answer
    x = 89,570.70

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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.