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Finding the Fourth Proportional to 86,864.70, 119,857.86 and 51,061.98

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Solution

The fourth proportional to 86,864.70, 119,857.86 and 51,061.98 is: 70,456.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,864.70 : 119,857.86 = 51,061.98 : x
  2. Step 2: Convert to fraction form
    86,864.70/119,857.86 = 51,061.98/x
  3. Step 3: Cross multiply
    86,864.70x = 119,857.86 × 51,061.98
  4. Step 4: Simplify right side
    86,864.70x = 6,120,179,650.16
  5. Step 5: Solve for x
    x = 6,120,179,650.16/86,864.70
  6. Step 6: Final answer
    x = 70,456.46

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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.