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Finding the Fourth Proportional to 121,290.60, 181,935.90 and 115,847.40

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Solution

The fourth proportional to 121,290.60, 181,935.90 and 115,847.40 is: 173,771.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,290.60 : 181,935.90 = 115,847.40 : x
  2. Step 2: Convert to fraction form
    121,290.60/181,935.90 = 115,847.40/x
  3. Step 3: Cross multiply
    121,290.60x = 181,935.90 × 115,847.40
  4. Step 4: Simplify right side
    121,290.60x = 21,076,800,981.66
  5. Step 5: Solve for x
    x = 21,076,800,981.66/121,290.60
  6. Step 6: Final answer
    x = 173,771.10

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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.