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Finding the Fourth Proportional to 139,009.13, 191,833.01 and 75,347.18

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Solution

The fourth proportional to 139,009.13, 191,833.01 and 75,347.18 is: 103,979.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,009.13 : 191,833.01 = 75,347.18 : x
  2. Step 2: Convert to fraction form
    139,009.13/191,833.01 = 75,347.18/x
  3. Step 3: Cross multiply
    139,009.13x = 191,833.01 × 75,347.18
  4. Step 4: Simplify right side
    139,009.13x = 14,454,074,998.51
  5. Step 5: Solve for x
    x = 14,454,074,998.51/139,009.13
  6. Step 6: Final answer
    x = 103,979.33

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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.