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Finding the Fourth Proportional to 78,959,138.40, 118,226,131.20 and 78,959,138.40

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Solution

The fourth proportional to 78,959,138.40, 118,226,131.20 and 78,959,138.40 is: 118,226,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959,138.40 : 118,226,131.20 = 78,959,138.40 : x
  2. Step 2: Convert to fraction form
    78,959,138.40/118,226,131.20 = 78,959,138.40/x
  3. Step 3: Cross multiply
    78,959,138.40x = 118,226,131.20 × 78,959,138.40
  4. Step 4: Simplify right side
    78,959,138.40x = 9,335,033,455,917,360
  5. Step 5: Solve for x
    x = 9,335,033,455,917,360/78,959,138.40
  6. Step 6: Final answer
    x = 118,226,131.20

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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.