Home / 124,721.20-186,876.60-72,038.80

Finding the Fourth Proportional to 124,721.20, 186,876.60 and 72,038.80

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Solution

The fourth proportional to 124,721.20, 186,876.60 and 72,038.80 is: 107,939.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,721.20 : 186,876.60 = 72,038.80 : x
  2. Step 2: Convert to fraction form
    124,721.20/186,876.60 = 72,038.80/x
  3. Step 3: Cross multiply
    124,721.20x = 186,876.60 × 72,038.80
  4. Step 4: Simplify right side
    124,721.20x = 13,462,366,012.08
  5. Step 5: Solve for x
    x = 13,462,366,012.08/124,721.20
  6. Step 6: Final answer
    x = 107,939.68

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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.