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Finding the Fourth Proportional to 111,163.95, 153,391.80 and 63,414.45

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Solution

The fourth proportional to 111,163.95, 153,391.80 and 63,414.45 is: 87,503.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,163.95 : 153,391.80 = 63,414.45 : x
  2. Step 2: Convert to fraction form
    111,163.95/153,391.80 = 63,414.45/x
  3. Step 3: Cross multiply
    111,163.95x = 153,391.80 × 63,414.45
  4. Step 4: Simplify right side
    111,163.95x = 9,727,256,631.51
  5. Step 5: Solve for x
    x = 9,727,256,631.51/111,163.95
  6. Step 6: Final answer
    x = 87,503.70

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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.