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Finding the Fourth Proportional to 121,880.68, 181,489.28 and 117,396.64

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Solution

The fourth proportional to 121,880.68, 181,489.28 and 117,396.64 is: 174,812.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,880.68 : 181,489.28 = 117,396.64 : x
  2. Step 2: Convert to fraction form
    121,880.68/181,489.28 = 117,396.64/x
  3. Step 3: Cross multiply
    121,880.68x = 181,489.28 × 117,396.64
  4. Step 4: Simplify right side
    121,880.68x = 21,306,231,668.02
  5. Step 5: Solve for x
    x = 21,306,231,668.02/121,880.68
  6. Step 6: Final answer
    x = 174,812.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.