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Finding the Fourth Proportional to 78,963.60, 109,042.54 and 50,718.48

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Solution

The fourth proportional to 78,963.60, 109,042.54 and 50,718.48 is: 70,038.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,963.60 : 109,042.54 = 50,718.48 : x
  2. Step 2: Convert to fraction form
    78,963.60/109,042.54 = 50,718.48/x
  3. Step 3: Cross multiply
    78,963.60x = 109,042.54 × 50,718.48
  4. Step 4: Simplify right side
    78,963.60x = 5,530,471,884.14
  5. Step 5: Solve for x
    x = 5,530,471,884.14/78,963.60
  6. Step 6: Final answer
    x = 70,038.24

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1.5x scale

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.