Home / 90,862.82-136,255.35-31,680.98

Finding the Fourth Proportional to 90,862.82, 136,255.35 and 31,680.98

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Solution

The fourth proportional to 90,862.82, 136,255.35 and 31,680.98 is: 47,507.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,862.82 : 136,255.35 = 31,680.98 : x
  2. Step 2: Convert to fraction form
    90,862.82/136,255.35 = 31,680.98/x
  3. Step 3: Cross multiply
    90,862.82x = 136,255.35 × 31,680.98
  4. Step 4: Simplify right side
    90,862.82x = 4,316,703,018.24
  5. Step 5: Solve for x
    x = 4,316,703,018.24/90,862.82
  6. Step 6: Final answer
    x = 47,507.91

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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.