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Finding the Fourth Proportional to 111,489.82, 153,853.16 and 63,740.12

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Solution

The fourth proportional to 111,489.82, 153,853.16 and 63,740.12 is: 87,959.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,489.82 : 153,853.16 = 63,740.12 : x
  2. Step 2: Convert to fraction form
    111,489.82/153,853.16 = 63,740.12/x
  3. Step 3: Cross multiply
    111,489.82x = 153,853.16 × 63,740.12
  4. Step 4: Simplify right side
    111,489.82x = 9,806,617,792.81
  5. Step 5: Solve for x
    x = 9,806,617,792.81/111,489.82
  6. Step 6: Final answer
    x = 87,959.76

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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.