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Finding the Fourth Proportional to 101,690.48, 140,249.67 and 71,575.49

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Solution

The fourth proportional to 101,690.48, 140,249.67 and 71,575.49 is: 98,715.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,690.48 : 140,249.67 = 71,575.49 : x
  2. Step 2: Convert to fraction form
    101,690.48/140,249.67 = 71,575.49/x
  3. Step 3: Cross multiply
    101,690.48x = 140,249.67 × 71,575.49
  4. Step 4: Simplify right side
    101,690.48x = 10,038,438,852.59
  5. Step 5: Solve for x
    x = 10,038,438,852.59/101,690.48
  6. Step 6: Final answer
    x = 98,715.62

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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.