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Finding the Fourth Proportional to 109,321.77, 150,864.89 and 61,570.65

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Solution

The fourth proportional to 109,321.77, 150,864.89 and 61,570.65 is: 84,967.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,321.77 : 150,864.89 = 61,570.65 : x
  2. Step 2: Convert to fraction form
    109,321.77/150,864.89 = 61,570.65/x
  3. Step 3: Cross multiply
    109,321.77x = 150,864.89 × 61,570.65
  4. Step 4: Simplify right side
    109,321.77x = 9,288,849,339.48
  5. Step 5: Solve for x
    x = 9,288,849,339.48/109,321.77
  6. Step 6: Final answer
    x = 84,967.97

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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.