Home / 81,411.45-122,117.18-71,569.95

Finding the Fourth Proportional to 81,411.45, 122,117.18 and 71,569.95

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Solution

The fourth proportional to 81,411.45, 122,117.18 and 71,569.95 is: 107,354.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,411.45 : 122,117.18 = 71,569.95 : x
  2. Step 2: Convert to fraction form
    81,411.45/122,117.18 = 71,569.95/x
  3. Step 3: Cross multiply
    81,411.45x = 122,117.18 × 71,569.95
  4. Step 4: Simplify right side
    81,411.45x = 8,739,920,108.89
  5. Step 5: Solve for x
    x = 8,739,920,108.89/81,411.45
  6. Step 6: Final answer
    x = 107,354.93

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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.