Home / 105,728.20-145,911.66-69,855.28

Finding the Fourth Proportional to 105,728.20, 145,911.66 and 69,855.28

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Solution

The fourth proportional to 105,728.20, 145,911.66 and 69,855.28 is: 96,404.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,728.20 : 145,911.66 = 69,855.28 : x
  2. Step 2: Convert to fraction form
    105,728.20/145,911.66 = 69,855.28/x
  3. Step 3: Cross multiply
    105,728.20x = 145,911.66 × 69,855.28
  4. Step 4: Simplify right side
    105,728.20x = 10,192,699,864.56
  5. Step 5: Solve for x
    x = 10,192,699,864.56/105,728.20
  6. Step 6: Final answer
    x = 96,404.74

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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.