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Finding the Fourth Proportional to 144,341.62, 216,708.76 and 81,206.16

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Solution

The fourth proportional to 144,341.62, 216,708.76 and 81,206.16 is: 121,919.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,341.62 : 216,708.76 = 81,206.16 : x
  2. Step 2: Convert to fraction form
    144,341.62/216,708.76 = 81,206.16/x
  3. Step 3: Cross multiply
    144,341.62x = 216,708.76 × 81,206.16
  4. Step 4: Simplify right side
    144,341.62x = 17,598,086,237.96
  5. Step 5: Solve for x
    x = 17,598,086,237.96/144,341.62
  6. Step 6: Final answer
    x = 121,919.69

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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.