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Finding the Fourth Proportional to 103,311.61, 154,946.99 and 28,412.42

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Solution

The fourth proportional to 103,311.61, 154,946.99 and 28,412.42 is: 42,613.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,311.61 : 154,946.99 = 28,412.42 : x
  2. Step 2: Convert to fraction form
    103,311.61/154,946.99 = 28,412.42/x
  3. Step 3: Cross multiply
    103,311.61x = 154,946.99 × 28,412.42
  4. Step 4: Simplify right side
    103,311.61x = 4,402,418,253.91
  5. Step 5: Solve for x
    x = 4,402,418,253.91/103,311.61
  6. Step 6: Final answer
    x = 42,613.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.