Home / 124,429.20-186,206.40-86,812.80

Finding the Fourth Proportional to 124,429.20, 186,206.40 and 86,812.80

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Solution

The fourth proportional to 124,429.20, 186,206.40 and 86,812.80 is: 129,914.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,429.20 : 186,206.40 = 86,812.80 : x
  2. Step 2: Convert to fraction form
    124,429.20/186,206.40 = 86,812.80/x
  3. Step 3: Cross multiply
    124,429.20x = 186,206.40 × 86,812.80
  4. Step 4: Simplify right side
    124,429.20x = 16,165,098,961.92
  5. Step 5: Solve for x
    x = 16,165,098,961.92/124,429.20
  6. Step 6: Final answer
    x = 129,914.03

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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.