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Finding the Fourth Proportional to 121,351.60, 181,638.60 and 94,913.20

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Solution

The fourth proportional to 121,351.60, 181,638.60 and 94,913.20 is: 142,065.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,351.60 : 181,638.60 = 94,913.20 : x
  2. Step 2: Convert to fraction form
    121,351.60/181,638.60 = 94,913.20/x
  3. Step 3: Cross multiply
    121,351.60x = 181,638.60 × 94,913.20
  4. Step 4: Simplify right side
    121,351.60x = 17,239,900,769.52
  5. Step 5: Solve for x
    x = 17,239,900,769.52/121,351.60
  6. Step 6: Final answer
    x = 142,065.71

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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.