Home / 90,988.11-136,558.85-38,435.31

Finding the Fourth Proportional to 90,988.11, 136,558.85 and 38,435.31

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Solution

The fourth proportional to 90,988.11, 136,558.85 and 38,435.31 is: 57,685.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,988.11 : 136,558.85 = 38,435.31 : x
  2. Step 2: Convert to fraction form
    90,988.11/136,558.85 = 38,435.31/x
  3. Step 3: Cross multiply
    90,988.11x = 136,558.85 × 38,435.31
  4. Step 4: Simplify right side
    90,988.11x = 5,248,681,540.82
  5. Step 5: Solve for x
    x = 5,248,681,540.82/90,988.11
  6. Step 6: Final answer
    x = 57,685.36

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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.