Home / 90,862.11-136,311.45-31,681.89

Finding the Fourth Proportional to 90,862.11, 136,311.45 and 31,681.89

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Solution

The fourth proportional to 90,862.11, 136,311.45 and 31,681.89 is: 47,529.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,862.11 : 136,311.45 = 31,681.89 : x
  2. Step 2: Convert to fraction form
    90,862.11/136,311.45 = 31,681.89/x
  3. Step 3: Cross multiply
    90,862.11x = 136,311.45 × 31,681.89
  4. Step 4: Simplify right side
    90,862.11x = 4,318,604,364.64
  5. Step 5: Solve for x
    x = 4,318,604,364.64/90,862.11
  6. Step 6: Final answer
    x = 47,529.21

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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.