Home / 120,811.10-181,216.65-70,915.10

Finding the Fourth Proportional to 120,811.10, 181,216.65 and 70,915.10

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Solution

The fourth proportional to 120,811.10, 181,216.65 and 70,915.10 is: 106,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,811.10 : 181,216.65 = 70,915.10 : x
  2. Step 2: Convert to fraction form
    120,811.10/181,216.65 = 70,915.10/x
  3. Step 3: Cross multiply
    120,811.10x = 181,216.65 × 70,915.10
  4. Step 4: Simplify right side
    120,811.10x = 12,850,996,856.42
  5. Step 5: Solve for x
    x = 12,850,996,856.42/120,811.10
  6. Step 6: Final answer
    x = 106,372.65

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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.