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Finding the Fourth Proportional to 139,009.61, 191,833.55 and 75,347.45

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Solution

The fourth proportional to 139,009.61, 191,833.55 and 75,347.45 is: 103,979.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,009.61 : 191,833.55 = 75,347.45 : x
  2. Step 2: Convert to fraction form
    139,009.61/191,833.55 = 75,347.45/x
  3. Step 3: Cross multiply
    139,009.61x = 191,833.55 × 75,347.45
  4. Step 4: Simplify right side
    139,009.61x = 14,454,167,481.04
  5. Step 5: Solve for x
    x = 14,454,167,481.04/139,009.61
  6. Step 6: Final answer
    x = 103,979.63

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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.