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Finding the Fourth Proportional to 65,712.95, 90,683.78 and 37,418.63

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Solution

The fourth proportional to 65,712.95, 90,683.78 and 37,418.63 is: 51,637.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,712.95 : 90,683.78 = 37,418.63 : x
  2. Step 2: Convert to fraction form
    65,712.95/90,683.78 = 37,418.63/x
  3. Step 3: Cross multiply
    65,712.95x = 90,683.78 × 37,418.63
  4. Step 4: Simplify right side
    65,712.95x = 3,393,262,850.44
  5. Step 5: Solve for x
    x = 3,393,262,850.44/65,712.95
  6. Step 6: Final answer
    x = 51,637.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.