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Finding the Fourth Proportional to 91,442.91, 126,186.12 and 51,148.89

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Solution

The fourth proportional to 91,442.91, 126,186.12 and 51,148.89 is: 70,582.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,442.91 : 126,186.12 = 51,148.89 : x
  2. Step 2: Convert to fraction form
    91,442.91/126,186.12 = 51,148.89/x
  3. Step 3: Cross multiply
    91,442.91x = 126,186.12 × 51,148.89
  4. Step 4: Simplify right side
    91,442.91x = 6,454,279,971.41
  5. Step 5: Solve for x
    x = 6,454,279,971.41/91,442.91
  6. Step 6: Final answer
    x = 70,582.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.