Home / 287,374.25-431,061.39-87,695.69

Finding the Fourth Proportional to 287,374.25, 431,061.39 and 87,695.69

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Solution

The fourth proportional to 287,374.25, 431,061.39 and 87,695.69 is: 131,543.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,374.25 : 431,061.39 = 87,695.69 : x
  2. Step 2: Convert to fraction form
    287,374.25/431,061.39 = 87,695.69/x
  3. Step 3: Cross multiply
    287,374.25x = 431,061.39 × 87,695.69
  4. Step 4: Simplify right side
    287,374.25x = 37,802,223,873.10
  5. Step 5: Solve for x
    x = 37,802,223,873.10/287,374.25
  6. Step 6: Final answer
    x = 131,543.53

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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.