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Finding the Fourth Proportional to 111,294.65, 153,639.81 and 63,538.77

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Solution

The fourth proportional to 111,294.65, 153,639.81 and 63,538.77 is: 87,713.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,294.65 : 153,639.81 = 63,538.77 : x
  2. Step 2: Convert to fraction form
    111,294.65/153,639.81 = 63,538.77/x
  3. Step 3: Cross multiply
    111,294.65x = 153,639.81 × 63,538.77
  4. Step 4: Simplify right side
    111,294.65x = 9,762,084,550.43
  5. Step 5: Solve for x
    x = 9,762,084,550.43/111,294.65
  6. Step 6: Final answer
    x = 87,713.87

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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.