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Finding the Fourth Proportional to 121,289.60, 181,934.40 and 115,846.40

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Solution

The fourth proportional to 121,289.60, 181,934.40 and 115,846.40 is: 173,769.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,289.60 : 181,934.40 = 115,846.40 : x
  2. Step 2: Convert to fraction form
    121,289.60/181,934.40 = 115,846.40/x
  3. Step 3: Cross multiply
    121,289.60x = 181,934.40 × 115,846.40
  4. Step 4: Simplify right side
    121,289.60x = 21,076,445,276.16
  5. Step 5: Solve for x
    x = 21,076,445,276.16/121,289.60
  6. Step 6: Final answer
    x = 173,769.60

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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.