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Finding the Fourth Proportional to 73,258.19, 109,891.54 and 28,279.80

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Solution

The fourth proportional to 73,258.19, 109,891.54 and 28,279.80 is: 42,421.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,258.19 : 109,891.54 = 28,279.80 : x
  2. Step 2: Convert to fraction form
    73,258.19/109,891.54 = 28,279.80/x
  3. Step 3: Cross multiply
    73,258.19x = 109,891.54 × 28,279.80
  4. Step 4: Simplify right side
    73,258.19x = 3,107,710,772.89
  5. Step 5: Solve for x
    x = 3,107,710,772.89/73,258.19
  6. Step 6: Final answer
    x = 42,421.34

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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.