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Finding the Fourth Proportional to 86,466.69, 119,216.61 and 72,147.51

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Solution

The fourth proportional to 86,466.69, 119,216.61 and 72,147.51 is: 99,473.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,466.69 : 119,216.61 = 72,147.51 : x
  2. Step 2: Convert to fraction form
    86,466.69/119,216.61 = 72,147.51/x
  3. Step 3: Cross multiply
    86,466.69x = 119,216.61 × 72,147.51
  4. Step 4: Simplify right side
    86,466.69x = 8,601,181,562.14
  5. Step 5: Solve for x
    x = 8,601,181,562.14/86,466.69
  6. Step 6: Final answer
    x = 99,473.93

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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.