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Finding the Fourth Proportional to 78,956.95, 118,454.01 and 25,648.76

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Solution

The fourth proportional to 78,956.95, 118,454.01 and 25,648.76 is: 38,479.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,956.95 : 118,454.01 = 25,648.76 : x
  2. Step 2: Convert to fraction form
    78,956.95/118,454.01 = 25,648.76/x
  3. Step 3: Cross multiply
    78,956.95x = 118,454.01 × 25,648.76
  4. Step 4: Simplify right side
    78,956.95x = 3,038,198,473.53
  5. Step 5: Solve for x
    x = 3,038,198,473.53/78,956.95
  6. Step 6: Final answer
    x = 38,479.18

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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.