Home / 138,481.14-191,109.54-78,054.30

Finding the Fourth Proportional to 138,481.14, 191,109.54 and 78,054.30

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Solution

The fourth proportional to 138,481.14, 191,109.54 and 78,054.30 is: 107,718.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,481.14 : 191,109.54 = 78,054.30 : x
  2. Step 2: Convert to fraction form
    138,481.14/191,109.54 = 78,054.30/x
  3. Step 3: Cross multiply
    138,481.14x = 191,109.54 × 78,054.30
  4. Step 4: Simplify right side
    138,481.14x = 14,916,921,368.02
  5. Step 5: Solve for x
    x = 14,916,921,368.02/138,481.14
  6. Step 6: Final answer
    x = 107,718.07

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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.