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Finding the Fourth Proportional to 139,009.35, 191,833.10 and 75,347.13

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Solution

The fourth proportional to 139,009.35, 191,833.10 and 75,347.13 is: 103,979.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,009.35 : 191,833.10 = 75,347.13 : x
  2. Step 2: Convert to fraction form
    139,009.35/191,833.10 = 75,347.13/x
  3. Step 3: Cross multiply
    139,009.35x = 191,833.10 × 75,347.13
  4. Step 4: Simplify right side
    139,009.35x = 14,454,073,147.27
  5. Step 5: Solve for x
    x = 14,454,073,147.27/139,009.35
  6. Step 6: Final answer
    x = 103,979.14

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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.