Home / 121,208.10-181,920.15-71,225.70

Finding the Fourth Proportional to 121,208.10, 181,920.15 and 71,225.70

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Solution

The fourth proportional to 121,208.10, 181,920.15 and 71,225.70 is: 106,902.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,208.10 : 181,920.15 = 71,225.70 : x
  2. Step 2: Convert to fraction form
    121,208.10/181,920.15 = 71,225.70/x
  3. Step 3: Cross multiply
    121,208.10x = 181,920.15 × 71,225.70
  4. Step 4: Simplify right side
    121,208.10x = 12,957,390,027.86
  5. Step 5: Solve for x
    x = 12,957,390,027.86/121,208.10
  6. Step 6: Final answer
    x = 106,902.01

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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.