Home / 287,769.40-431,616.30-88,109.80

Finding the Fourth Proportional to 287,769.40, 431,616.30 and 88,109.80

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Solution

The fourth proportional to 287,769.40, 431,616.30 and 88,109.80 is: 132,153.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,769.40 : 431,616.30 = 88,109.80 : x
  2. Step 2: Convert to fraction form
    287,769.40/431,616.30 = 88,109.80/x
  3. Step 3: Cross multiply
    287,769.40x = 431,616.30 × 88,109.80
  4. Step 4: Simplify right side
    287,769.40x = 38,029,625,869.74
  5. Step 5: Solve for x
    x = 38,029,625,869.74/287,769.40
  6. Step 6: Final answer
    x = 132,153.13

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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.