Home / 124,905.40-187,358.10-72,287.80

Finding the Fourth Proportional to 124,905.40, 187,358.10 and 72,287.80

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Solution

The fourth proportional to 124,905.40, 187,358.10 and 72,287.80 is: 108,431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,905.40 : 187,358.10 = 72,287.80 : x
  2. Step 2: Convert to fraction form
    124,905.40/187,358.10 = 72,287.80/x
  3. Step 3: Cross multiply
    124,905.40x = 187,358.10 × 72,287.80
  4. Step 4: Simplify right side
    124,905.40x = 13,543,704,861.18
  5. Step 5: Solve for x
    x = 13,543,704,861.18/124,905.40
  6. Step 6: Final answer
    x = 108,431.70

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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.