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Finding the Fourth Proportional to 78,962.60, 109,041.16 and 50,717.48

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Solution

The fourth proportional to 78,962.60, 109,041.16 and 50,717.48 is: 70,036.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,962.60 : 109,041.16 = 50,717.48 : x
  2. Step 2: Convert to fraction form
    78,962.60/109,041.16 = 50,717.48/x
  3. Step 3: Cross multiply
    78,962.60x = 109,041.16 × 50,717.48
  4. Step 4: Simplify right side
    78,962.60x = 5,530,292,851.48
  5. Step 5: Solve for x
    x = 5,530,292,851.48/78,962.60
  6. Step 6: Final answer
    x = 70,036.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.