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Finding the Fourth Proportional to 78,680.79, 117,957.08 and 36,587.45

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Solution

The fourth proportional to 78,680.79, 117,957.08 and 36,587.45 is: 54,851.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,680.79 : 117,957.08 = 36,587.45 : x
  2. Step 2: Convert to fraction form
    78,680.79/117,957.08 = 36,587.45/x
  3. Step 3: Cross multiply
    78,680.79x = 117,957.08 × 36,587.45
  4. Step 4: Simplify right side
    78,680.79x = 4,315,747,993.92
  5. Step 5: Solve for x
    x = 4,315,747,993.92/78,680.79
  6. Step 6: Final answer
    x = 54,851.36

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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.