Home / 81,060.75-121,585.05-28,470.69

Finding the Fourth Proportional to 81,060.75, 121,585.05 and 28,470.69

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Solution

The fourth proportional to 81,060.75, 121,585.05 and 28,470.69 is: 42,703.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,060.75 : 121,585.05 = 28,470.69 : x
  2. Step 2: Convert to fraction form
    81,060.75/121,585.05 = 28,470.69/x
  3. Step 3: Cross multiply
    81,060.75x = 121,585.05 × 28,470.69
  4. Step 4: Simplify right side
    81,060.75x = 3,461,610,267.18
  5. Step 5: Solve for x
    x = 3,461,610,267.18/81,060.75
  6. Step 6: Final answer
    x = 42,703.90

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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.