Home / 87,721.12-131,547.36-28,542.40

Finding the Fourth Proportional to 87,721.12, 131,547.36 and 28,542.40

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Solution

The fourth proportional to 87,721.12, 131,547.36 and 28,542.40 is: 42,802.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,721.12 : 131,547.36 = 28,542.40 : x
  2. Step 2: Convert to fraction form
    87,721.12/131,547.36 = 28,542.40/x
  3. Step 3: Cross multiply
    87,721.12x = 131,547.36 × 28,542.40
  4. Step 4: Simplify right side
    87,721.12x = 3,754,677,368.06
  5. Step 5: Solve for x
    x = 3,754,677,368.06/87,721.12
  6. Step 6: Final answer
    x = 42,802.43

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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.