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Finding the Fourth Proportional to 144,515.80, 216,773.70 and 121,187.80

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Solution

The fourth proportional to 144,515.80, 216,773.70 and 121,187.80 is: 181,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,515.80 : 216,773.70 = 121,187.80 : x
  2. Step 2: Convert to fraction form
    144,515.80/216,773.70 = 121,187.80/x
  3. Step 3: Cross multiply
    144,515.80x = 216,773.70 × 121,187.80
  4. Step 4: Simplify right side
    144,515.80x = 26,270,327,800.86
  5. Step 5: Solve for x
    x = 26,270,327,800.86/144,515.80
  6. Step 6: Final answer
    x = 181,781.70

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1.5x scale

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.