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Finding the Fourth Proportional to 287,911.80, 431,900.10 and 88,230.60

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Solution

The fourth proportional to 287,911.80, 431,900.10 and 88,230.60 is: 132,355.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,911.80 : 431,900.10 = 88,230.60 : x
  2. Step 2: Convert to fraction form
    287,911.80/431,900.10 = 88,230.60/x
  3. Step 3: Cross multiply
    287,911.80x = 431,900.10 × 88,230.60
  4. Step 4: Simplify right side
    287,911.80x = 38,106,804,963.06
  5. Step 5: Solve for x
    x = 38,106,804,963.06/287,911.80
  6. Step 6: Final answer
    x = 132,355.83

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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.