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Finding the Fourth Proportional to 356,505.75, 534,753.55 and 86,635.87

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Solution

The fourth proportional to 356,505.75, 534,753.55 and 86,635.87 is: 129,952.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,505.75 : 534,753.55 = 86,635.87 : x
  2. Step 2: Convert to fraction form
    356,505.75/534,753.55 = 86,635.87/x
  3. Step 3: Cross multiply
    356,505.75x = 534,753.55 × 86,635.87
  4. Step 4: Simplify right side
    356,505.75x = 46,328,839,039.84
  5. Step 5: Solve for x
    x = 46,328,839,039.84/356,505.75
  6. Step 6: Final answer
    x = 129,952.57

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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.