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Finding the Fourth Proportional to 78,959.64, 118,458.05 and 25,651.44

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Solution

The fourth proportional to 78,959.64, 118,458.05 and 25,651.44 is: 38,483.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959.64 : 118,458.05 = 25,651.44 : x
  2. Step 2: Convert to fraction form
    78,959.64/118,458.05 = 25,651.44/x
  3. Step 3: Cross multiply
    78,959.64x = 118,458.05 × 25,651.44
  4. Step 4: Simplify right side
    78,959.64x = 3,038,619,433.83
  5. Step 5: Solve for x
    x = 3,038,619,433.83/78,959.64
  6. Step 6: Final answer
    x = 38,483.20

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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.