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Finding the Fourth Proportional to 65,315.40, 90,138.82 and 36,644.14

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Solution

The fourth proportional to 65,315.40, 90,138.82 and 36,644.14 is: 50,570.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,315.40 : 90,138.82 = 36,644.14 : x
  2. Step 2: Convert to fraction form
    65,315.40/90,138.82 = 36,644.14/x
  3. Step 3: Cross multiply
    65,315.40x = 90,138.82 × 36,644.14
  4. Step 4: Simplify right side
    65,315.40x = 3,303,059,526.22
  5. Step 5: Solve for x
    x = 3,303,059,526.22/65,315.40
  6. Step 6: Final answer
    x = 50,570.92

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1.5x scale

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.