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Finding the Fourth Proportional to 50,835, 70,153.11 and 28,479

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Solution

The fourth proportional to 50,835, 70,153.11 and 28,479 is: 39,301.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,835 : 70,153.11 = 28,479 : x
  2. Step 2: Convert to fraction form
    50,835/70,153.11 = 28,479/x
  3. Step 3: Cross multiply
    50,835x = 70,153.11 × 28,479
  4. Step 4: Simplify right side
    50,835x = 1,997,890,419.69
  5. Step 5: Solve for x
    x = 1,997,890,419.69/50,835
  6. Step 6: Final answer
    x = 39,301.47

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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.