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Finding the Fourth Proportional to 145,189.80, 200,721.22 and 143,859.80

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Solution

The fourth proportional to 145,189.80, 200,721.22 and 143,859.80 is: 198,882.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,189.80 : 200,721.22 = 143,859.80 : x
  2. Step 2: Convert to fraction form
    145,189.80/200,721.22 = 143,859.80/x
  3. Step 3: Cross multiply
    145,189.80x = 200,721.22 × 143,859.80
  4. Step 4: Simplify right side
    145,189.80x = 28,875,714,564.96
  5. Step 5: Solve for x
    x = 28,875,714,564.96/145,189.80
  6. Step 6: Final answer
    x = 198,882.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.