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Finding the Fourth Proportional to 101,448.90, 139,974.30 and 65,595.76

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Solution

The fourth proportional to 101,448.90, 139,974.30 and 65,595.76 is: 90,505.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,448.90 : 139,974.30 = 65,595.76 : x
  2. Step 2: Convert to fraction form
    101,448.90/139,974.30 = 65,595.76/x
  3. Step 3: Cross multiply
    101,448.90x = 139,974.30 × 65,595.76
  4. Step 4: Simplify right side
    101,448.90x = 9,181,720,588.97
  5. Step 5: Solve for x
    x = 9,181,720,588.97/101,448.90
  6. Step 6: Final answer
    x = 90,505.87

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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.