Home / 138,667.92-191,345.25-78,235.03

Finding the Fourth Proportional to 138,667.92, 191,345.25 and 78,235.03

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Solution

The fourth proportional to 138,667.92, 191,345.25 and 78,235.03 is: 107,955.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,667.92 : 191,345.25 = 78,235.03 : x
  2. Step 2: Convert to fraction form
    138,667.92/191,345.25 = 78,235.03/x
  3. Step 3: Cross multiply
    138,667.92x = 191,345.25 × 78,235.03
  4. Step 4: Simplify right side
    138,667.92x = 14,969,901,374.11
  5. Step 5: Solve for x
    x = 14,969,901,374.11/138,667.92
  6. Step 6: Final answer
    x = 107,955.04

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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.