Home / 129,697.80-178,984.00-72,335.22

Finding the Fourth Proportional to 129,697.80, 178,984.00 and 72,335.22

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Solution

The fourth proportional to 129,697.80, 178,984.00 and 72,335.22 is: 99,823.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,697.80 : 178,984.00 = 72,335.22 : x
  2. Step 2: Convert to fraction form
    129,697.80/178,984.00 = 72,335.22/x
  3. Step 3: Cross multiply
    129,697.80x = 178,984.00 × 72,335.22
  4. Step 4: Simplify right side
    129,697.80x = 12,946,846,435.71
  5. Step 5: Solve for x
    x = 12,946,846,435.71/129,697.80
  6. Step 6: Final answer
    x = 99,823.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.