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Finding the Fourth Proportional to 266,472.18, 399,771.18 and 86,557.05

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Solution

The fourth proportional to 266,472.18, 399,771.18 and 86,557.05 is: 129,856.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,472.18 : 399,771.18 = 86,557.05 : x
  2. Step 2: Convert to fraction form
    266,472.18/399,771.18 = 86,557.05/x
  3. Step 3: Cross multiply
    266,472.18x = 399,771.18 × 86,557.05
  4. Step 4: Simplify right side
    266,472.18x = 34,603,014,015.82
  5. Step 5: Solve for x
    x = 34,603,014,015.82/266,472.18
  6. Step 6: Final answer
    x = 129,856.01

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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.