Home / 287,631.10-431,503.26-87,979.96

Finding the Fourth Proportional to 287,631.10, 431,503.26 and 87,979.96

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Solution

The fourth proportional to 287,631.10, 431,503.26 and 87,979.96 is: 131,987.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,631.10 : 431,503.26 = 87,979.96 : x
  2. Step 2: Convert to fraction form
    287,631.10/431,503.26 = 87,979.96/x
  3. Step 3: Cross multiply
    287,631.10x = 431,503.26 × 87,979.96
  4. Step 4: Simplify right side
    287,631.10x = 37,963,639,554.67
  5. Step 5: Solve for x
    x = 37,963,639,554.67/287,631.10
  6. Step 6: Final answer
    x = 131,987.26

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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.