Home / 109,431.20-164,146.80-56,943.20

Finding the Fourth Proportional to 109,431.20, 164,146.80 and 56,943.20

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Solution

The fourth proportional to 109,431.20, 164,146.80 and 56,943.20 is: 85,414.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,431.20 : 164,146.80 = 56,943.20 : x
  2. Step 2: Convert to fraction form
    109,431.20/164,146.80 = 56,943.20/x
  3. Step 3: Cross multiply
    109,431.20x = 164,146.80 × 56,943.20
  4. Step 4: Simplify right side
    109,431.20x = 9,347,044,061.76
  5. Step 5: Solve for x
    x = 9,347,044,061.76/109,431.20
  6. Step 6: Final answer
    x = 85,414.80

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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.