Home / 121,152.30-181,656.45-74,438.70

Finding the Fourth Proportional to 121,152.30, 181,656.45 and 74,438.70

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Solution

The fourth proportional to 121,152.30, 181,656.45 and 74,438.70 is: 111,613.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,152.30 : 181,656.45 = 74,438.70 : x
  2. Step 2: Convert to fraction form
    121,152.30/181,656.45 = 74,438.70/x
  3. Step 3: Cross multiply
    121,152.30x = 181,656.45 × 74,438.70
  4. Step 4: Simplify right side
    121,152.30x = 13,522,269,984.62
  5. Step 5: Solve for x
    x = 13,522,269,984.62/121,152.30
  6. Step 6: Final answer
    x = 111,613.81

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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.