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Finding the Fourth Proportional to 40,139.80, 60,209.70 and 19,365.40

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Solution

The fourth proportional to 40,139.80, 60,209.70 and 19,365.40 is: 29,048.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,139.80 : 60,209.70 = 19,365.40 : x
  2. Step 2: Convert to fraction form
    40,139.80/60,209.70 = 19,365.40/x
  3. Step 3: Cross multiply
    40,139.80x = 60,209.70 × 19,365.40
  4. Step 4: Simplify right side
    40,139.80x = 1,165,984,924.38
  5. Step 5: Solve for x
    x = 1,165,984,924.38/40,139.80
  6. Step 6: Final answer
    x = 29,048.10

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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.