Home / 81,701.64-122,176.22-77,715.83

Finding the Fourth Proportional to 81,701.64, 122,176.22 and 77,715.83

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Solution

The fourth proportional to 81,701.64, 122,176.22 and 77,715.83 is: 116,215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,701.64 : 122,176.22 = 77,715.83 : x
  2. Step 2: Convert to fraction form
    81,701.64/122,176.22 = 77,715.83/x
  3. Step 3: Cross multiply
    81,701.64x = 122,176.22 × 77,715.83
  4. Step 4: Simplify right side
    81,701.64x = 9,495,026,537.85
  5. Step 5: Solve for x
    x = 9,495,026,537.85/81,701.64
  6. Step 6: Final answer
    x = 116,215.87

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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.