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Finding the Fourth Proportional to 102,956.80, 154,435.20 and 98,145.40

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Solution

The fourth proportional to 102,956.80, 154,435.20 and 98,145.40 is: 147,218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,956.80 : 154,435.20 = 98,145.40 : x
  2. Step 2: Convert to fraction form
    102,956.80/154,435.20 = 98,145.40/x
  3. Step 3: Cross multiply
    102,956.80x = 154,435.20 × 98,145.40
  4. Step 4: Simplify right side
    102,956.80x = 15,157,104,478.08
  5. Step 5: Solve for x
    x = 15,157,104,478.08/102,956.80
  6. Step 6: Final answer
    x = 147,218.10

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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.