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Finding the Fourth Proportional to 101,079.38, 139,534.38 and 65,286.84

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Solution

The fourth proportional to 101,079.38, 139,534.38 and 65,286.84 is: 90,124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,079.38 : 139,534.38 = 65,286.84 : x
  2. Step 2: Convert to fraction form
    101,079.38/139,534.38 = 65,286.84/x
  3. Step 3: Cross multiply
    101,079.38x = 139,534.38 × 65,286.84
  4. Step 4: Simplify right side
    101,079.38x = 9,109,759,264.81
  5. Step 5: Solve for x
    x = 9,109,759,264.81/101,079.38
  6. Step 6: Final answer
    x = 90,124.80

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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.