Home / 91,909,037.20-137,721,838.20-79,721,323.60

Finding the Fourth Proportional to 91,909,037.20, 137,721,838.20 and 79,721,323.60

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Solution

The fourth proportional to 91,909,037.20, 137,721,838.20 and 79,721,323.60 is: 119,459,060.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,909,037.20 : 137,721,838.20 = 79,721,323.60 : x
  2. Step 2: Convert to fraction form
    91,909,037.20/137,721,838.20 = 79,721,323.60/x
  3. Step 3: Cross multiply
    91,909,037.20x = 137,721,838.20 × 79,721,323.60
  4. Step 4: Simplify right side
    91,909,037.20x = 10,979,367,229,929,040
  5. Step 5: Solve for x
    x = 10,979,367,229,929,040/91,909,037.20
  6. Step 6: Final answer
    x = 119,459,060.44

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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.