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Finding the Fourth Proportional to 84,040.80, 125,888.40 and 57,775.20

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Solution

The fourth proportional to 84,040.80, 125,888.40 and 57,775.20 is: 86,544.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,040.80 : 125,888.40 = 57,775.20 : x
  2. Step 2: Convert to fraction form
    84,040.80/125,888.40 = 57,775.20/x
  3. Step 3: Cross multiply
    84,040.80x = 125,888.40 × 57,775.20
  4. Step 4: Simplify right side
    84,040.80x = 7,273,227,487.68
  5. Step 5: Solve for x
    x = 7,273,227,487.68/84,040.80
  6. Step 6: Final answer
    x = 86,544.01

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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.