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Finding the Fourth Proportional to 39,958.40, 59,908.80 and 26,115.20

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Solution

The fourth proportional to 39,958.40, 59,908.80 and 26,115.20 is: 39,153.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,958.40 : 59,908.80 = 26,115.20 : x
  2. Step 2: Convert to fraction form
    39,958.40/59,908.80 = 26,115.20/x
  3. Step 3: Cross multiply
    39,958.40x = 59,908.80 × 26,115.20
  4. Step 4: Simplify right side
    39,958.40x = 1,564,530,293.76
  5. Step 5: Solve for x
    x = 1,564,530,293.76/39,958.40
  6. Step 6: Final answer
    x = 39,153.98

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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.