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Finding the Fourth Proportional to 47,840.80, 71,728.80 and 25,355.20

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Solution

The fourth proportional to 47,840.80, 71,728.80 and 25,355.20 is: 38,015.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,840.80 : 71,728.80 = 25,355.20 : x
  2. Step 2: Convert to fraction form
    47,840.80/71,728.80 = 25,355.20/x
  3. Step 3: Cross multiply
    47,840.80x = 71,728.80 × 25,355.20
  4. Step 4: Simplify right side
    47,840.80x = 1,818,698,069.76
  5. Step 5: Solve for x
    x = 1,818,698,069.76/47,840.80
  6. Step 6: Final answer
    x = 38,015.63

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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.