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Finding the Fourth Proportional to 143,205.66, 213,369.44 and 135,157.50

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Solution

The fourth proportional to 143,205.66, 213,369.44 and 135,157.50 is: 201,378.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,205.66 : 213,369.44 = 135,157.50 : x
  2. Step 2: Convert to fraction form
    143,205.66/213,369.44 = 135,157.50/x
  3. Step 3: Cross multiply
    143,205.66x = 213,369.44 × 135,157.50
  4. Step 4: Simplify right side
    143,205.66x = 28,838,479,411.01
  5. Step 5: Solve for x
    x = 28,838,479,411.01/143,205.66
  6. Step 6: Final answer
    x = 201,378.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.