Home / 131,848.56-181,943.28-78,138.72

Finding the Fourth Proportional to 131,848.56, 181,943.28 and 78,138.72

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Solution

The fourth proportional to 131,848.56, 181,943.28 and 78,138.72 is: 107,826.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,848.56 : 181,943.28 = 78,138.72 : x
  2. Step 2: Convert to fraction form
    131,848.56/181,943.28 = 78,138.72/x
  3. Step 3: Cross multiply
    131,848.56x = 181,943.28 × 78,138.72
  4. Step 4: Simplify right side
    131,848.56x = 14,216,815,011.80
  5. Step 5: Solve for x
    x = 14,216,815,011.80/131,848.56
  6. Step 6: Final answer
    x = 107,826.85

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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.