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Finding the Fourth Proportional to 102,574.30, 153,861.45 and 86,827.90

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Solution

The fourth proportional to 102,574.30, 153,861.45 and 86,827.90 is: 130,241.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,574.30 : 153,861.45 = 86,827.90 : x
  2. Step 2: Convert to fraction form
    102,574.30/153,861.45 = 86,827.90/x
  3. Step 3: Cross multiply
    102,574.30x = 153,861.45 × 86,827.90
  4. Step 4: Simplify right side
    102,574.30x = 13,359,466,594.46
  5. Step 5: Solve for x
    x = 13,359,466,594.46/102,574.30
  6. Step 6: Final answer
    x = 130,241.85

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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.