Home / 80,717,779.80-121,395,534.30-72,427,300.20

Finding the Fourth Proportional to 80,717,779.80, 121,395,534.30 and 72,427,300.20

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Solution

The fourth proportional to 80,717,779.80, 121,395,534.30 and 72,427,300.20 is: 108,927,064.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,717,779.80 : 121,395,534.30 = 72,427,300.20 : x
  2. Step 2: Convert to fraction form
    80,717,779.80/121,395,534.30 = 72,427,300.20/x
  3. Step 3: Cross multiply
    80,717,779.80x = 121,395,534.30 × 72,427,300.20
  4. Step 4: Simplify right side
    80,717,779.80x = 8,792,350,805,685,497
  5. Step 5: Solve for x
    x = 8,792,350,805,685,497/80,717,779.80
  6. Step 6: Final answer
    x = 108,927,064.49

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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.