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Finding the Fourth Proportional to 139,646.58, 209,666.70 and 100,182.18

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Solution

The fourth proportional to 139,646.58, 209,666.70 and 100,182.18 is: 150,414.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,646.58 : 209,666.70 = 100,182.18 : x
  2. Step 2: Convert to fraction form
    139,646.58/209,666.70 = 100,182.18/x
  3. Step 3: Cross multiply
    139,646.58x = 209,666.70 × 100,182.18
  4. Step 4: Simplify right side
    139,646.58x = 21,004,867,079.41
  5. Step 5: Solve for x
    x = 21,004,867,079.41/139,646.58
  6. Step 6: Final answer
    x = 150,414.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.