Home / 81,656.85-122,437.60-31,678.55

Finding the Fourth Proportional to 81,656.85, 122,437.60 and 31,678.55

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Solution

The fourth proportional to 81,656.85, 122,437.60 and 31,678.55 is: 47,499.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656.85 : 122,437.60 = 31,678.55 : x
  2. Step 2: Convert to fraction form
    81,656.85/122,437.60 = 31,678.55/x
  3. Step 3: Cross multiply
    81,656.85x = 122,437.60 × 31,678.55
  4. Step 4: Simplify right side
    81,656.85x = 3,878,645,633.48
  5. Step 5: Solve for x
    x = 3,878,645,633.48/81,656.85
  6. Step 6: Final answer
    x = 47,499.33

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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.