Home / 120,664.34-180,701.12-85,038.10

Finding the Fourth Proportional to 120,664.34, 180,701.12 and 85,038.10

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Solution

The fourth proportional to 120,664.34, 180,701.12 and 85,038.10 is: 127,348.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,664.34 : 180,701.12 = 85,038.10 : x
  2. Step 2: Convert to fraction form
    120,664.34/180,701.12 = 85,038.10/x
  3. Step 3: Cross multiply
    120,664.34x = 180,701.12 × 85,038.10
  4. Step 4: Simplify right side
    120,664.34x = 15,366,479,912.67
  5. Step 5: Solve for x
    x = 15,366,479,912.67/120,664.34
  6. Step 6: Final answer
    x = 127,348.97

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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.