Home / 115,821.11-159,821.47-64,830.53

Finding the Fourth Proportional to 115,821.11, 159,821.47 and 64,830.53

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Solution

The fourth proportional to 115,821.11, 159,821.47 and 64,830.53 is: 89,459.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,821.11 : 159,821.47 = 64,830.53 : x
  2. Step 2: Convert to fraction form
    115,821.11/159,821.47 = 64,830.53/x
  3. Step 3: Cross multiply
    115,821.11x = 159,821.47 × 64,830.53
  4. Step 4: Simplify right side
    115,821.11x = 10,361,311,086.07
  5. Step 5: Solve for x
    x = 10,361,311,086.07/115,821.11
  6. Step 6: Final answer
    x = 89,459.61

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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.