Home / 258,215.31-387,385.23-89,711.11

Finding the Fourth Proportional to 258,215.31, 387,385.23 and 89,711.11

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Solution

The fourth proportional to 258,215.31, 387,385.23 and 89,711.11 is: 134,588.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,215.31 : 387,385.23 = 89,711.11 : x
  2. Step 2: Convert to fraction form
    258,215.31/387,385.23 = 89,711.11/x
  3. Step 3: Cross multiply
    258,215.31x = 387,385.23 × 89,711.11
  4. Step 4: Simplify right side
    258,215.31x = 34,752,759,801.55
  5. Step 5: Solve for x
    x = 34,752,759,801.55/258,215.31
  6. Step 6: Final answer
    x = 134,588.30

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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.