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Finding the Fourth Proportional to 52,479.88, 72,420 and 28,606

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Solution

The fourth proportional to 52,479.88, 72,420 and 28,606 is: 39,475.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,479.88 : 72,420 = 28,606 : x
  2. Step 2: Convert to fraction form
    52,479.88/72,420 = 28,606/x
  3. Step 3: Cross multiply
    52,479.88x = 72,420 × 28,606
  4. Step 4: Simplify right side
    52,479.88x = 2,071,646,520
  5. Step 5: Solve for x
    x = 2,071,646,520/52,479.88
  6. Step 6: Final answer
    x = 39,475.06

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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.