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Finding the Fourth Proportional to 84,007.20, 125,719.20 and 57,763.20

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Solution

The fourth proportional to 84,007.20, 125,719.20 and 57,763.20 is: 86,444.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,007.20 : 125,719.20 = 57,763.20 : x
  2. Step 2: Convert to fraction form
    84,007.20/125,719.20 = 57,763.20/x
  3. Step 3: Cross multiply
    84,007.20x = 125,719.20 × 57,763.20
  4. Step 4: Simplify right side
    84,007.20x = 7,261,943,293.44
  5. Step 5: Solve for x
    x = 7,261,943,293.44/84,007.20
  6. Step 6: Final answer
    x = 86,444.30

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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.