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Finding the Fourth Proportional to 426,170.76, 639,360.24 and 141,860.76

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Solution

The fourth proportional to 426,170.76, 639,360.24 and 141,860.76 is: 212,825.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,170.76 : 639,360.24 = 141,860.76 : x
  2. Step 2: Convert to fraction form
    426,170.76/639,360.24 = 141,860.76/x
  3. Step 3: Cross multiply
    426,170.76x = 639,360.24 × 141,860.76
  4. Step 4: Simplify right side
    426,170.76x = 90,700,129,560.18
  5. Step 5: Solve for x
    x = 90,700,129,560.18/426,170.76
  6. Step 6: Final answer
    x = 212,825.79

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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.