Home / 287,789.80-431,717.10-88,108.60

Finding the Fourth Proportional to 287,789.80, 431,717.10 and 88,108.60

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Solution

The fourth proportional to 287,789.80, 431,717.10 and 88,108.60 is: 132,172.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,789.80 : 431,717.10 = 88,108.60 : x
  2. Step 2: Convert to fraction form
    287,789.80/431,717.10 = 88,108.60/x
  3. Step 3: Cross multiply
    287,789.80x = 431,717.10 × 88,108.60
  4. Step 4: Simplify right side
    287,789.80x = 38,037,989,277.06
  5. Step 5: Solve for x
    x = 38,037,989,277.06/287,789.80
  6. Step 6: Final answer
    x = 132,172.82

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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.