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Finding the Fourth Proportional to 238,861.41, 358,347.47 and 81,089.86

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Solution

The fourth proportional to 238,861.41, 358,347.47 and 81,089.86 is: 121,653.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,861.41 : 358,347.47 = 81,089.86 : x
  2. Step 2: Convert to fraction form
    238,861.41/358,347.47 = 81,089.86/x
  3. Step 3: Cross multiply
    238,861.41x = 358,347.47 × 81,089.86
  4. Step 4: Simplify right side
    238,861.41x = 29,058,345,772.30
  5. Step 5: Solve for x
    x = 29,058,345,772.30/238,861.41
  6. Step 6: Final answer
    x = 121,653.58

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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.