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Finding the Fourth Proportional to 60,472.64, 90,709.88 and 21,031.11

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Solution

The fourth proportional to 60,472.64, 90,709.88 and 21,031.11 is: 31,546.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,472.64 : 90,709.88 = 21,031.11 : x
  2. Step 2: Convert to fraction form
    60,472.64/90,709.88 = 21,031.11/x
  3. Step 3: Cross multiply
    60,472.64x = 90,709.88 × 21,031.11
  4. Step 4: Simplify right side
    60,472.64x = 1,907,729,359.21
  5. Step 5: Solve for x
    x = 1,907,729,359.21/60,472.64
  6. Step 6: Final answer
    x = 31,546.98

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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.