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Finding the Fourth Proportional to 121,113.20, 181,669.80 and 47,241.20

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Solution

The fourth proportional to 121,113.20, 181,669.80 and 47,241.20 is: 70,861.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,113.20 : 181,669.80 = 47,241.20 : x
  2. Step 2: Convert to fraction form
    121,113.20/181,669.80 = 47,241.20/x
  3. Step 3: Cross multiply
    121,113.20x = 181,669.80 × 47,241.20
  4. Step 4: Simplify right side
    121,113.20x = 8,582,299,355.76
  5. Step 5: Solve for x
    x = 8,582,299,355.76/121,113.20
  6. Step 6: Final answer
    x = 70,861.80

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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.