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Finding the Fourth Proportional to 48,672.78, 72,953.10 and 21,990

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Solution

The fourth proportional to 48,672.78, 72,953.10 and 21,990 is: 32,959.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,672.78 : 72,953.10 = 21,990 : x
  2. Step 2: Convert to fraction form
    48,672.78/72,953.10 = 21,990/x
  3. Step 3: Cross multiply
    48,672.78x = 72,953.10 × 21,990
  4. Step 4: Simplify right side
    48,672.78x = 1,604,238,669.00
  5. Step 5: Solve for x
    x = 1,604,238,669.00/48,672.78
  6. Step 6: Final answer
    x = 32,959.67

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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.