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Finding the Fourth Proportional to 111,237.25, 153,518.42 and 63,497.78

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Solution

The fourth proportional to 111,237.25, 153,518.42 and 63,497.78 is: 87,633.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,237.25 : 153,518.42 = 63,497.78 : x
  2. Step 2: Convert to fraction form
    111,237.25/153,518.42 = 63,497.78/x
  3. Step 3: Cross multiply
    111,237.25x = 153,518.42 × 63,497.78
  4. Step 4: Simplify right side
    111,237.25x = 9,748,078,859.11
  5. Step 5: Solve for x
    x = 9,748,078,859.11/111,237.25
  6. Step 6: Final answer
    x = 87,633.22

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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.