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Finding the Fourth Proportional to 139,998.80, 191,652.68 and 138,998.24

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Solution

The fourth proportional to 139,998.80, 191,652.68 and 138,998.24 is: 190,282.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,998.80 : 191,652.68 = 138,998.24 : x
  2. Step 2: Convert to fraction form
    139,998.80/191,652.68 = 138,998.24/x
  3. Step 3: Cross multiply
    139,998.80x = 191,652.68 × 138,998.24
  4. Step 4: Simplify right side
    139,998.80x = 26,639,385,211.28
  5. Step 5: Solve for x
    x = 26,639,385,211.28/139,998.80
  6. Step 6: Final answer
    x = 190,282.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.