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Finding the Fourth Proportional to 102,734.80, 154,063.80 and 71,477.20

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Solution

The fourth proportional to 102,734.80, 154,063.80 and 71,477.20 is: 107,189.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,734.80 : 154,063.80 = 71,477.20 : x
  2. Step 2: Convert to fraction form
    102,734.80/154,063.80 = 71,477.20/x
  3. Step 3: Cross multiply
    102,734.80x = 154,063.80 × 71,477.20
  4. Step 4: Simplify right side
    102,734.80x = 11,012,049,045.36
  5. Step 5: Solve for x
    x = 11,012,049,045.36/102,734.80
  6. Step 6: Final answer
    x = 107,189.08

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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.