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Finding the Fourth Proportional to 121,057.60, 181,240.80 and 74,401.60

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Solution

The fourth proportional to 121,057.60, 181,240.80 and 74,401.60 is: 111,390.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,057.60 : 181,240.80 = 74,401.60 : x
  2. Step 2: Convert to fraction form
    121,057.60/181,240.80 = 74,401.60/x
  3. Step 3: Cross multiply
    121,057.60x = 181,240.80 × 74,401.60
  4. Step 4: Simplify right side
    121,057.60x = 13,484,605,505.28
  5. Step 5: Solve for x
    x = 13,484,605,505.28/121,057.60
  6. Step 6: Final answer
    x = 111,390.00

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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.