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Finding the Fourth Proportional to 111,748.68, 154,215.90 and 61,447.68

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Solution

The fourth proportional to 111,748.68, 154,215.90 and 61,447.68 is: 84,799.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,748.68 : 154,215.90 = 61,447.68 : x
  2. Step 2: Convert to fraction form
    111,748.68/154,215.90 = 61,447.68/x
  3. Step 3: Cross multiply
    111,748.68x = 154,215.90 × 61,447.68
  4. Step 4: Simplify right side
    111,748.68x = 9,476,209,274.11
  5. Step 5: Solve for x
    x = 9,476,209,274.11/111,748.68
  6. Step 6: Final answer
    x = 84,799.29

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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.