Home / 81,164.77-121,764.47-47,909.61

Finding the Fourth Proportional to 81,164.77, 121,764.47 and 47,909.61

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Solution

The fourth proportional to 81,164.77, 121,764.47 and 47,909.61 is: 71,874.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,164.77 : 121,764.47 = 47,909.61 : x
  2. Step 2: Convert to fraction form
    81,164.77/121,764.47 = 47,909.61/x
  3. Step 3: Cross multiply
    81,164.77x = 121,764.47 × 47,909.61
  4. Step 4: Simplify right side
    81,164.77x = 5,833,688,030.01
  5. Step 5: Solve for x
    x = 5,833,688,030.01/81,164.77
  6. Step 6: Final answer
    x = 71,874.63

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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.