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Finding the Fourth Proportional to 78,443.28, 108,258.12 and 44,911.44

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Solution

The fourth proportional to 78,443.28, 108,258.12 and 44,911.44 is: 61,981.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,443.28 : 108,258.12 = 44,911.44 : x
  2. Step 2: Convert to fraction form
    78,443.28/108,258.12 = 44,911.44/x
  3. Step 3: Cross multiply
    78,443.28x = 108,258.12 × 44,911.44
  4. Step 4: Simplify right side
    78,443.28x = 4,862,028,060.89
  5. Step 5: Solve for x
    x = 4,862,028,060.89/78,443.28
  6. Step 6: Final answer
    x = 61,981.45

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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.