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Finding the Fourth Proportional to 108,030.20, 162,045.30 and 74,787.80

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Solution

The fourth proportional to 108,030.20, 162,045.30 and 74,787.80 is: 112,181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,030.20 : 162,045.30 = 74,787.80 : x
  2. Step 2: Convert to fraction form
    108,030.20/162,045.30 = 74,787.80/x
  3. Step 3: Cross multiply
    108,030.20x = 162,045.30 × 74,787.80
  4. Step 4: Simplify right side
    108,030.20x = 12,119,011,487.34
  5. Step 5: Solve for x
    x = 12,119,011,487.34/108,030.20
  6. Step 6: Final answer
    x = 112,181.70

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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.