Home / 120,545.40-180,818.10-115,426.20

Finding the Fourth Proportional to 120,545.40, 180,818.10 and 115,426.20

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Solution

The fourth proportional to 120,545.40, 180,818.10 and 115,426.20 is: 173,139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,545.40 : 180,818.10 = 115,426.20 : x
  2. Step 2: Convert to fraction form
    120,545.40/180,818.10 = 115,426.20/x
  3. Step 3: Cross multiply
    120,545.40x = 180,818.10 × 115,426.20
  4. Step 4: Simplify right side
    120,545.40x = 20,871,146,174.22
  5. Step 5: Solve for x
    x = 20,871,146,174.22/120,545.40
  6. Step 6: Final answer
    x = 173,139.30

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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.