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Finding the Fourth Proportional to 111,902.91, 154,421.19 and 60,915.72

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Solution

The fourth proportional to 111,902.91, 154,421.19 and 60,915.72 is: 84,061.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,902.91 : 154,421.19 = 60,915.72 : x
  2. Step 2: Convert to fraction form
    111,902.91/154,421.19 = 60,915.72/x
  3. Step 3: Cross multiply
    111,902.91x = 154,421.19 × 60,915.72
  4. Step 4: Simplify right side
    111,902.91x = 9,406,677,972.11
  5. Step 5: Solve for x
    x = 9,406,677,972.11/111,902.91
  6. Step 6: Final answer
    x = 84,061.07

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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.