Home / 121,428.10-182,142.15-38,311.30

Finding the Fourth Proportional to 121,428.10, 182,142.15 and 38,311.30

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Solution

The fourth proportional to 121,428.10, 182,142.15 and 38,311.30 is: 57,466.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,428.10 : 182,142.15 = 38,311.30 : x
  2. Step 2: Convert to fraction form
    121,428.10/182,142.15 = 38,311.30/x
  3. Step 3: Cross multiply
    121,428.10x = 182,142.15 × 38,311.30
  4. Step 4: Simplify right side
    121,428.10x = 6,978,102,551.30
  5. Step 5: Solve for x
    x = 6,978,102,551.30/121,428.10
  6. Step 6: Final answer
    x = 57,466.95

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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.