Home / 80,717,999.80-121,395,864.30-72,427,520.20

Finding the Fourth Proportional to 80,717,999.80, 121,395,864.30 and 72,427,520.20

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Solution

The fourth proportional to 80,717,999.80, 121,395,864.30 and 72,427,520.20 is: 108,927,394.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,717,999.80 : 121,395,864.30 = 72,427,520.20 : x
  2. Step 2: Convert to fraction form
    80,717,999.80/121,395,864.30 = 72,427,520.20/x
  3. Step 3: Cross multiply
    80,717,999.80x = 121,395,864.30 × 72,427,520.20
  4. Step 4: Simplify right side
    80,717,999.80x = 8,792,401,413,784,709
  5. Step 5: Solve for x
    x = 8,792,401,413,784,709/80,717,999.80
  6. Step 6: Final answer
    x = 108,927,394.58

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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.