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Finding the Fourth Proportional to 139,630.80, 209,454.30 and 39,798.30

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Solution

The fourth proportional to 139,630.80, 209,454.30 and 39,798.30 is: 59,699.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,630.80 : 209,454.30 = 39,798.30 : x
  2. Step 2: Convert to fraction form
    139,630.80/209,454.30 = 39,798.30/x
  3. Step 3: Cross multiply
    139,630.80x = 209,454.30 × 39,798.30
  4. Step 4: Simplify right side
    139,630.80x = 8,335,925,067.69
  5. Step 5: Solve for x
    x = 8,335,925,067.69/139,630.80
  6. Step 6: Final answer
    x = 59,699.76

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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.