Home / 287,631.12-431,641.08-100,644.24

Finding the Fourth Proportional to 287,631.12, 431,641.08 and 100,644.24

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Solution

The fourth proportional to 287,631.12, 431,641.08 and 100,644.24 is: 151,034.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,631.12 : 431,641.08 = 100,644.24 : x
  2. Step 2: Convert to fraction form
    287,631.12/431,641.08 = 100,644.24/x
  3. Step 3: Cross multiply
    287,631.12x = 431,641.08 × 100,644.24
  4. Step 4: Simplify right side
    287,631.12x = 43,442,188,449.38
  5. Step 5: Solve for x
    x = 43,442,188,449.38/287,631.12
  6. Step 6: Final answer
    x = 151,034.38

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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.