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Finding the Fourth Proportional to 258,266.99, 356,391.18 and 143,538.18

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Solution

The fourth proportional to 258,266.99, 356,391.18 and 143,538.18 is: 198,073.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,266.99 : 356,391.18 = 143,538.18 : x
  2. Step 2: Convert to fraction form
    258,266.99/356,391.18 = 143,538.18/x
  3. Step 3: Cross multiply
    258,266.99x = 356,391.18 × 143,538.18
  4. Step 4: Simplify right side
    258,266.99x = 51,155,741,345.25
  5. Step 5: Solve for x
    x = 51,155,741,345.25/258,266.99
  6. Step 6: Final answer
    x = 198,073.10

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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.