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Finding the Fourth Proportional to 78,802.16, 108,712.68 and 51,910.16

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Solution

The fourth proportional to 78,802.16, 108,712.68 and 51,910.16 is: 71,613.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,802.16 : 108,712.68 = 51,910.16 : x
  2. Step 2: Convert to fraction form
    78,802.16/108,712.68 = 51,910.16/x
  3. Step 3: Cross multiply
    78,802.16x = 108,712.68 × 51,910.16
  4. Step 4: Simplify right side
    78,802.16x = 5,643,292,612.83
  5. Step 5: Solve for x
    x = 5,643,292,612.83/78,802.16
  6. Step 6: Final answer
    x = 71,613.43

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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.