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Finding the Fourth Proportional to 109,317.82, 150,859.12 and 61,572.02

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Solution

The fourth proportional to 109,317.82, 150,859.12 and 61,572.02 is: 84,969.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,317.82 : 150,859.12 = 61,572.02 : x
  2. Step 2: Convert to fraction form
    109,317.82/150,859.12 = 61,572.02/x
  3. Step 3: Cross multiply
    109,317.82x = 150,859.12 × 61,572.02
  4. Step 4: Simplify right side
    109,317.82x = 9,288,700,753.82
  5. Step 5: Solve for x
    x = 9,288,700,753.82/109,317.82
  6. Step 6: Final answer
    x = 84,969.69

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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.