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Finding the Fourth Proportional to 452,281.20, 678,520.20 and 136,729.86

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Solution

The fourth proportional to 452,281.20, 678,520.20 and 136,729.86 is: 205,124.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,281.20 : 678,520.20 = 136,729.86 : x
  2. Step 2: Convert to fraction form
    452,281.20/678,520.20 = 136,729.86/x
  3. Step 3: Cross multiply
    452,281.20x = 678,520.20 × 136,729.86
  4. Step 4: Simplify right side
    452,281.20x = 92,773,971,953.17
  5. Step 5: Solve for x
    x = 92,773,971,953.17/452,281.20
  6. Step 6: Final answer
    x = 205,124.54

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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.