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Finding the Fourth Proportional to 59,680.80, 89,540.40 and 39,981.60

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Solution

The fourth proportional to 59,680.80, 89,540.40 and 39,981.60 is: 59,985.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,680.80 : 89,540.40 = 39,981.60 : x
  2. Step 2: Convert to fraction form
    59,680.80/89,540.40 = 39,981.60/x
  3. Step 3: Cross multiply
    59,680.80x = 89,540.40 × 39,981.60
  4. Step 4: Simplify right side
    59,680.80x = 3,579,968,456.64
  5. Step 5: Solve for x
    x = 3,579,968,456.64/59,680.80
  6. Step 6: Final answer
    x = 59,985.26

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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.