Home / 120,319.89-180,419.09-70,414.98

Finding the Fourth Proportional to 120,319.89, 180,419.09 and 70,414.98

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Solution

The fourth proportional to 120,319.89, 180,419.09 and 70,414.98 is: 105,586.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,319.89 : 180,419.09 = 70,414.98 : x
  2. Step 2: Convert to fraction form
    120,319.89/180,419.09 = 70,414.98/x
  3. Step 3: Cross multiply
    120,319.89x = 180,419.09 × 70,414.98
  4. Step 4: Simplify right side
    120,319.89x = 12,704,206,261.89
  5. Step 5: Solve for x
    x = 12,704,206,261.89/120,319.89
  6. Step 6: Final answer
    x = 105,586.92

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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.