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Finding the Fourth Proportional to 78,961.25, 118,449.84 and 25,651.01

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Solution

The fourth proportional to 78,961.25, 118,449.84 and 25,651.01 is: 38,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,961.25 : 118,449.84 = 25,651.01 : x
  2. Step 2: Convert to fraction form
    78,961.25/118,449.84 = 25,651.01/x
  3. Step 3: Cross multiply
    78,961.25x = 118,449.84 × 25,651.01
  4. Step 4: Simplify right side
    78,961.25x = 3,038,358,030.34
  5. Step 5: Solve for x
    x = 3,038,358,030.34/78,961.25
  6. Step 6: Final answer
    x = 38,479.10

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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.