Home / 81,696,979.40-122,419,497.90-70,863,456.20

Finding the Fourth Proportional to 81,696,979.40, 122,419,497.90 and 70,863,456.20

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Solution

The fourth proportional to 81,696,979.40, 122,419,497.90 and 70,863,456.20 is: 106,185,917.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,696,979.40 : 122,419,497.90 = 70,863,456.20 : x
  2. Step 2: Convert to fraction form
    81,696,979.40/122,419,497.90 = 70,863,456.20/x
  3. Step 3: Cross multiply
    81,696,979.40x = 122,419,497.90 × 70,863,456.20
  4. Step 4: Simplify right side
    81,696,979.40x = 8,675,068,727,462,643
  5. Step 5: Solve for x
    x = 8,675,068,727,462,643/81,696,979.40
  6. Step 6: Final answer
    x = 106,185,917.66

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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.