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Finding the Fourth Proportional to 39,478.40, 59,120.40 and 26,259.20

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Solution

The fourth proportional to 39,478.40, 59,120.40 and 26,259.20 is: 39,324.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,478.40 : 59,120.40 = 26,259.20 : x
  2. Step 2: Convert to fraction form
    39,478.40/59,120.40 = 26,259.20/x
  3. Step 3: Cross multiply
    39,478.40x = 59,120.40 × 26,259.20
  4. Step 4: Simplify right side
    39,478.40x = 1,552,454,407.68
  5. Step 5: Solve for x
    x = 1,552,454,407.68/39,478.40
  6. Step 6: Final answer
    x = 39,324.15

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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.