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Finding the Fourth Proportional to 108,947.80, 163,421.70 and 102,824.20

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Solution

The fourth proportional to 108,947.80, 163,421.70 and 102,824.20 is: 154,236.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,947.80 : 163,421.70 = 102,824.20 : x
  2. Step 2: Convert to fraction form
    108,947.80/163,421.70 = 102,824.20/x
  3. Step 3: Cross multiply
    108,947.80x = 163,421.70 × 102,824.20
  4. Step 4: Simplify right side
    108,947.80x = 16,803,705,565.14
  5. Step 5: Solve for x
    x = 16,803,705,565.14/108,947.80
  6. Step 6: Final answer
    x = 154,236.30

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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.