Home / 81,147.40-121,721.10-47,883.40

Finding the Fourth Proportional to 81,147.40, 121,721.10 and 47,883.40

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Solution

The fourth proportional to 81,147.40, 121,721.10 and 47,883.40 is: 71,825.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,147.40 : 121,721.10 = 47,883.40 : x
  2. Step 2: Convert to fraction form
    81,147.40/121,721.10 = 47,883.40/x
  3. Step 3: Cross multiply
    81,147.40x = 121,721.10 × 47,883.40
  4. Step 4: Simplify right side
    81,147.40x = 5,828,420,119.74
  5. Step 5: Solve for x
    x = 5,828,420,119.74/81,147.40
  6. Step 6: Final answer
    x = 71,825.10

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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.