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Finding the Fourth Proportional to 101,437.62, 139,936.74 and 65,639.18

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Solution

The fourth proportional to 101,437.62, 139,936.74 and 65,639.18 is: 90,551.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,437.62 : 139,936.74 = 65,639.18 : x
  2. Step 2: Convert to fraction form
    101,437.62/139,936.74 = 65,639.18/x
  3. Step 3: Cross multiply
    101,437.62x = 139,936.74 × 65,639.18
  4. Step 4: Simplify right side
    101,437.62x = 9,185,332,865.47
  5. Step 5: Solve for x
    x = 9,185,332,865.47/101,437.62
  6. Step 6: Final answer
    x = 90,551.54

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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.