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Finding the Fourth Proportional to 65,311.31, 90,130.66 and 36,637.36

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Solution

The fourth proportional to 65,311.31, 90,130.66 and 36,637.36 is: 50,560.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,311.31 : 90,130.66 = 36,637.36 : x
  2. Step 2: Convert to fraction form
    65,311.31/90,130.66 = 36,637.36/x
  3. Step 3: Cross multiply
    65,311.31x = 90,130.66 × 36,637.36
  4. Step 4: Simplify right side
    65,311.31x = 3,302,149,627.52
  5. Step 5: Solve for x
    x = 3,302,149,627.52/65,311.31
  6. Step 6: Final answer
    x = 50,560.15

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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.