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Finding the Fourth Proportional to 258,155.80, 356,250.51 and 143,435.50

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Solution

The fourth proportional to 258,155.80, 356,250.51 and 143,435.50 is: 197,938.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,155.80 : 356,250.51 = 143,435.50 : x
  2. Step 2: Convert to fraction form
    258,155.80/356,250.51 = 143,435.50/x
  3. Step 3: Cross multiply
    258,155.80x = 356,250.51 × 143,435.50
  4. Step 4: Simplify right side
    258,155.80x = 51,098,969,136.48
  5. Step 5: Solve for x
    x = 51,098,969,136.48/258,155.80
  6. Step 6: Final answer
    x = 197,938.49

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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.