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Finding the Fourth Proportional to 111,898.40, 154,422.60 and 60,913.88

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Solution

The fourth proportional to 111,898.40, 154,422.60 and 60,913.88 is: 84,062.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,898.40 : 154,422.60 = 60,913.88 : x
  2. Step 2: Convert to fraction form
    111,898.40/154,422.60 = 60,913.88/x
  3. Step 3: Cross multiply
    111,898.40x = 154,422.60 × 60,913.88
  4. Step 4: Simplify right side
    111,898.40x = 9,406,479,725.69
  5. Step 5: Solve for x
    x = 9,406,479,725.69/111,898.40
  6. Step 6: Final answer
    x = 84,062.68

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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.