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Finding the Fourth Proportional to 111,043.71, 153,236.25 and 63,287.84

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Solution

The fourth proportional to 111,043.71, 153,236.25 and 63,287.84 is: 87,334.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,043.71 : 153,236.25 = 63,287.84 : x
  2. Step 2: Convert to fraction form
    111,043.71/153,236.25 = 63,287.84/x
  3. Step 3: Cross multiply
    111,043.71x = 153,236.25 × 63,287.84
  4. Step 4: Simplify right side
    111,043.71x = 9,697,991,655.29
  5. Step 5: Solve for x
    x = 9,697,991,655.29/111,043.71
  6. Step 6: Final answer
    x = 87,334.90

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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.