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Finding the Fourth Proportional to 143,857.64, 198,549.42 and 90,189.20

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Solution

The fourth proportional to 143,857.64, 198,549.42 and 90,189.20 is: 124,477.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,857.64 : 198,549.42 = 90,189.20 : x
  2. Step 2: Convert to fraction form
    143,857.64/198,549.42 = 90,189.20/x
  3. Step 3: Cross multiply
    143,857.64x = 198,549.42 × 90,189.20
  4. Step 4: Simplify right side
    143,857.64x = 17,907,013,350.26
  5. Step 5: Solve for x
    x = 17,907,013,350.26/143,857.64
  6. Step 6: Final answer
    x = 124,477.32

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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.