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Finding the Fourth Proportional to 111,458.30, 153,812.44 and 63,712.68

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Solution

The fourth proportional to 111,458.30, 153,812.44 and 63,712.68 is: 87,923.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,458.30 : 153,812.44 = 63,712.68 : x
  2. Step 2: Convert to fraction form
    111,458.30/153,812.44 = 63,712.68/x
  3. Step 3: Cross multiply
    111,458.30x = 153,812.44 × 63,712.68
  4. Step 4: Simplify right side
    111,458.30x = 9,799,802,769.74
  5. Step 5: Solve for x
    x = 9,799,802,769.74/111,458.30
  6. Step 6: Final answer
    x = 87,923.49

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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.