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Finding the Fourth Proportional to 144,541.80, 216,812.70 and 121,213.80

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Solution

The fourth proportional to 144,541.80, 216,812.70 and 121,213.80 is: 181,820.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,541.80 : 216,812.70 = 121,213.80 : x
  2. Step 2: Convert to fraction form
    144,541.80/216,812.70 = 121,213.80/x
  3. Step 3: Cross multiply
    144,541.80x = 216,812.70 × 121,213.80
  4. Step 4: Simplify right side
    144,541.80x = 26,280,691,255.26
  5. Step 5: Solve for x
    x = 26,280,691,255.26/144,541.80
  6. Step 6: Final answer
    x = 181,820.70

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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.