Home / 287,380.15-431,070.23-87,701.56

Finding the Fourth Proportional to 287,380.15, 431,070.23 and 87,701.56

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Solution

The fourth proportional to 287,380.15, 431,070.23 and 87,701.56 is: 131,552.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,380.15 : 431,070.23 = 87,701.56 : x
  2. Step 2: Convert to fraction form
    287,380.15/431,070.23 = 87,701.56/x
  3. Step 3: Cross multiply
    287,380.15x = 431,070.23 × 87,701.56
  4. Step 4: Simplify right side
    287,380.15x = 37,805,531,640.56
  5. Step 5: Solve for x
    x = 37,805,531,640.56/287,380.15
  6. Step 6: Final answer
    x = 131,552.34

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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.