Home / 138,444.52-191,040.44-78,005.20

Finding the Fourth Proportional to 138,444.52, 191,040.44 and 78,005.20

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Solution

The fourth proportional to 138,444.52, 191,040.44 and 78,005.20 is: 107,639.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,444.52 : 191,040.44 = 78,005.20 : x
  2. Step 2: Convert to fraction form
    138,444.52/191,040.44 = 78,005.20/x
  3. Step 3: Cross multiply
    138,444.52x = 191,040.44 × 78,005.20
  4. Step 4: Simplify right side
    138,444.52x = 14,902,147,730.29
  5. Step 5: Solve for x
    x = 14,902,147,730.29/138,444.52
  6. Step 6: Final answer
    x = 107,639.85

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1.5x scale

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.