Home / 136,972.47-189,040.82-78,828.02

Finding the Fourth Proportional to 136,972.47, 189,040.82 and 78,828.02

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Solution

The fourth proportional to 136,972.47, 189,040.82 and 78,828.02 is: 108,793.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,972.47 : 189,040.82 = 78,828.02 : x
  2. Step 2: Convert to fraction form
    136,972.47/189,040.82 = 78,828.02/x
  3. Step 3: Cross multiply
    136,972.47x = 189,040.82 × 78,828.02
  4. Step 4: Simplify right side
    136,972.47x = 14,901,712,200.43
  5. Step 5: Solve for x
    x = 14,901,712,200.43/136,972.47
  6. Step 6: Final answer
    x = 108,793.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.