Home / 120,416.85-180,576.77-78,233.72

Finding the Fourth Proportional to 120,416.85, 180,576.77 and 78,233.72

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Solution

The fourth proportional to 120,416.85, 180,576.77 and 78,233.72 is: 117,319.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,416.85 : 180,576.77 = 78,233.72 : x
  2. Step 2: Convert to fraction form
    120,416.85/180,576.77 = 78,233.72/x
  3. Step 3: Cross multiply
    120,416.85x = 180,576.77 × 78,233.72
  4. Step 4: Simplify right side
    120,416.85x = 14,127,191,168.63
  5. Step 5: Solve for x
    x = 14,127,191,168.63/120,416.85
  6. Step 6: Final answer
    x = 117,319.06

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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.