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Finding the Fourth Proportional to 78,768.68, 118,168.40 and 25,473.90

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Solution

The fourth proportional to 78,768.68, 118,168.40 and 25,473.90 is: 38,215.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,768.68 : 118,168.40 = 25,473.90 : x
  2. Step 2: Convert to fraction form
    78,768.68/118,168.40 = 25,473.90/x
  3. Step 3: Cross multiply
    78,768.68x = 118,168.40 × 25,473.90
  4. Step 4: Simplify right side
    78,768.68x = 3,010,210,068.44
  5. Step 5: Solve for x
    x = 3,010,210,068.44/78,768.68
  6. Step 6: Final answer
    x = 38,215.82

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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.