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Finding the Fourth Proportional to 143,579.81, 215,353.40 and 38,406.98

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Solution

The fourth proportional to 143,579.81, 215,353.40 and 38,406.98 is: 57,606.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,579.81 : 215,353.40 = 38,406.98 : x
  2. Step 2: Convert to fraction form
    143,579.81/215,353.40 = 38,406.98/x
  3. Step 3: Cross multiply
    143,579.81x = 215,353.40 × 38,406.98
  4. Step 4: Simplify right side
    143,579.81x = 8,271,074,073.08
  5. Step 5: Solve for x
    x = 8,271,074,073.08/143,579.81
  6. Step 6: Final answer
    x = 57,606.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.