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Finding the Fourth Proportional to 612,141.50, 918,265.17 and 168,909.50

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Solution

The fourth proportional to 612,141.50, 918,265.17 and 168,909.50 is: 253,378.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,141.50 : 918,265.17 = 168,909.50 : x
  2. Step 2: Convert to fraction form
    612,141.50/918,265.17 = 168,909.50/x
  3. Step 3: Cross multiply
    612,141.50x = 918,265.17 × 168,909.50
  4. Step 4: Simplify right side
    612,141.50x = 155,103,710,732.12
  5. Step 5: Solve for x
    x = 155,103,710,732.12/612,141.50
  6. Step 6: Final answer
    x = 253,378.85

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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.