Home / 81,252.74-121,780.68-71,411.24

Finding the Fourth Proportional to 81,252.74, 121,780.68 and 71,411.24

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Solution

The fourth proportional to 81,252.74, 121,780.68 and 71,411.24 is: 107,030.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,252.74 : 121,780.68 = 71,411.24 : x
  2. Step 2: Convert to fraction form
    81,252.74/121,780.68 = 71,411.24/x
  3. Step 3: Cross multiply
    81,252.74x = 121,780.68 × 71,411.24
  4. Step 4: Simplify right side
    81,252.74x = 8,696,509,366.84
  5. Step 5: Solve for x
    x = 8,696,509,366.84/81,252.74
  6. Step 6: Final answer
    x = 107,030.35

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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.