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Finding the Fourth Proportional to 43,981.80, 65,780.70 and 39,335.40

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Solution

The fourth proportional to 43,981.80, 65,780.70 and 39,335.40 is: 58,831.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,981.80 : 65,780.70 = 39,335.40 : x
  2. Step 2: Convert to fraction form
    43,981.80/65,780.70 = 39,335.40/x
  3. Step 3: Cross multiply
    43,981.80x = 65,780.70 × 39,335.40
  4. Step 4: Simplify right side
    43,981.80x = 2,587,510,146.78
  5. Step 5: Solve for x
    x = 2,587,510,146.78/43,981.80
  6. Step 6: Final answer
    x = 58,831.38

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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.