Home / 90,560.16-135,806.64-31,380

Finding the Fourth Proportional to 90,560.16, 135,806.64 and 31,380

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Solution

The fourth proportional to 90,560.16, 135,806.64 and 31,380 is: 47,058.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,560.16 : 135,806.64 = 31,380 : x
  2. Step 2: Convert to fraction form
    90,560.16/135,806.64 = 31,380/x
  3. Step 3: Cross multiply
    90,560.16x = 135,806.64 × 31,380
  4. Step 4: Simplify right side
    90,560.16x = 4,261,612,363.20
  5. Step 5: Solve for x
    x = 4,261,612,363.20/90,560.16
  6. Step 6: Final answer
    x = 47,058.36

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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.