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Finding the Fourth Proportional to 42,262.88, 63,373.80 and 21,193.88

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Solution

The fourth proportional to 42,262.88, 63,373.80 and 21,193.88 is: 31,780.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,262.88 : 63,373.80 = 21,193.88 : x
  2. Step 2: Convert to fraction form
    42,262.88/63,373.80 = 21,193.88/x
  3. Step 3: Cross multiply
    42,262.88x = 63,373.80 × 21,193.88
  4. Step 4: Simplify right side
    42,262.88x = 1,343,136,712.34
  5. Step 5: Solve for x
    x = 1,343,136,712.34/42,262.88
  6. Step 6: Final answer
    x = 31,780.53

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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.