Home / 129,804.12-179,132.02-76,127.86

Finding the Fourth Proportional to 129,804.12, 179,132.02 and 76,127.86

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Solution

The fourth proportional to 129,804.12, 179,132.02 and 76,127.86 is: 105,057.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,804.12 : 179,132.02 = 76,127.86 : x
  2. Step 2: Convert to fraction form
    129,804.12/179,132.02 = 76,127.86/x
  3. Step 3: Cross multiply
    129,804.12x = 179,132.02 × 76,127.86
  4. Step 4: Simplify right side
    129,804.12x = 13,636,937,340.08
  5. Step 5: Solve for x
    x = 13,636,937,340.08/129,804.12
  6. Step 6: Final answer
    x = 105,057.82

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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.