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Finding the Fourth Proportional to 78,865.07, 118,199.13 and 39,433.46

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Solution

The fourth proportional to 78,865.07, 118,199.13 and 39,433.46 is: 59,100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,865.07 : 118,199.13 = 39,433.46 : x
  2. Step 2: Convert to fraction form
    78,865.07/118,199.13 = 39,433.46/x
  3. Step 3: Cross multiply
    78,865.07x = 118,199.13 × 39,433.46
  4. Step 4: Simplify right side
    78,865.07x = 4,661,000,073.89
  5. Step 5: Solve for x
    x = 4,661,000,073.89/78,865.07
  6. Step 6: Final answer
    x = 59,100.95

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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.