Home / 109,423.20-164,134.80-74,431.20

Finding the Fourth Proportional to 109,423.20, 164,134.80 and 74,431.20

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Solution

The fourth proportional to 109,423.20, 164,134.80 and 74,431.20 is: 111,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,423.20 : 164,134.80 = 74,431.20 : x
  2. Step 2: Convert to fraction form
    109,423.20/164,134.80 = 74,431.20/x
  3. Step 3: Cross multiply
    109,423.20x = 164,134.80 × 74,431.20
  4. Step 4: Simplify right side
    109,423.20x = 12,216,750,125.76
  5. Step 5: Solve for x
    x = 12,216,750,125.76/109,423.20
  6. Step 6: Final answer
    x = 111,646.80

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1.5x scale

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.