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Finding the Fourth Proportional to 51,342.95, 76,981.47 and 21,377.95

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Solution

The fourth proportional to 51,342.95, 76,981.47 and 21,377.95 is: 32,053.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,342.95 : 76,981.47 = 21,377.95 : x
  2. Step 2: Convert to fraction form
    51,342.95/76,981.47 = 21,377.95/x
  3. Step 3: Cross multiply
    51,342.95x = 76,981.47 × 21,377.95
  4. Step 4: Simplify right side
    51,342.95x = 1,645,705,824.13
  5. Step 5: Solve for x
    x = 1,645,705,824.13/51,342.95
  6. Step 6: Final answer
    x = 32,053.20

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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.