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Finding the Fourth Proportional to 78,874.80, 108,848.28 and 43,064.40

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Solution

The fourth proportional to 78,874.80, 108,848.28 and 43,064.40 is: 59,429.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,874.80 : 108,848.28 = 43,064.40 : x
  2. Step 2: Convert to fraction form
    78,874.80/108,848.28 = 43,064.40/x
  3. Step 3: Cross multiply
    78,874.80x = 108,848.28 × 43,064.40
  4. Step 4: Simplify right side
    78,874.80x = 4,687,485,869.23
  5. Step 5: Solve for x
    x = 4,687,485,869.23/78,874.80
  6. Step 6: Final answer
    x = 59,429.45

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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.