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Finding the Fourth Proportional to 78,963.20, 118,502.40 and 52,659.20

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Solution

The fourth proportional to 78,963.20, 118,502.40 and 52,659.20 is: 79,027.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,963.20 : 118,502.40 = 52,659.20 : x
  2. Step 2: Convert to fraction form
    78,963.20/118,502.40 = 52,659.20/x
  3. Step 3: Cross multiply
    78,963.20x = 118,502.40 × 52,659.20
  4. Step 4: Simplify right side
    78,963.20x = 6,240,241,582.08
  5. Step 5: Solve for x
    x = 6,240,241,582.08/78,963.20
  6. Step 6: Final answer
    x = 79,027.21

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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.