Home / 287,590.13-431,386.31-87,909.74

Finding the Fourth Proportional to 287,590.13, 431,386.31 and 87,909.74

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Solution

The fourth proportional to 287,590.13, 431,386.31 and 87,909.74 is: 131,864.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,590.13 : 431,386.31 = 87,909.74 : x
  2. Step 2: Convert to fraction form
    287,590.13/431,386.31 = 87,909.74/x
  3. Step 3: Cross multiply
    287,590.13x = 431,386.31 × 87,909.74
  4. Step 4: Simplify right side
    287,590.13x = 37,923,056,833.64
  5. Step 5: Solve for x
    x = 37,923,056,833.64/287,590.13
  6. Step 6: Final answer
    x = 131,864.95

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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.