Home / 121,208.30-181,812.45-79,217.90

Finding the Fourth Proportional to 121,208.30, 181,812.45 and 79,217.90

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Solution

The fourth proportional to 121,208.30, 181,812.45 and 79,217.90 is: 118,826.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,208.30 : 181,812.45 = 79,217.90 : x
  2. Step 2: Convert to fraction form
    121,208.30/181,812.45 = 79,217.90/x
  3. Step 3: Cross multiply
    121,208.30x = 181,812.45 × 79,217.90
  4. Step 4: Simplify right side
    121,208.30x = 14,402,800,482.86
  5. Step 5: Solve for x
    x = 14,402,800,482.86/121,208.30
  6. Step 6: Final answer
    x = 118,826.85

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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.