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Finding the Fourth Proportional to 62,780.61, 94,135.47 and 20,649.30

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Solution

The fourth proportional to 62,780.61, 94,135.47 and 20,649.30 is: 30,962.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,780.61 : 94,135.47 = 20,649.30 : x
  2. Step 2: Convert to fraction form
    62,780.61/94,135.47 = 20,649.30/x
  3. Step 3: Cross multiply
    62,780.61x = 94,135.47 × 20,649.30
  4. Step 4: Simplify right side
    62,780.61x = 1,943,831,560.67
  5. Step 5: Solve for x
    x = 1,943,831,560.67/62,780.61
  6. Step 6: Final answer
    x = 30,962.29

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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.