Home / 105,445.99-145,517.07-57,703.78

Finding the Fourth Proportional to 105,445.99, 145,517.07 and 57,703.78

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Solution

The fourth proportional to 105,445.99, 145,517.07 and 57,703.78 is: 79,632.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,445.99 : 145,517.07 = 57,703.78 : x
  2. Step 2: Convert to fraction form
    105,445.99/145,517.07 = 57,703.78/x
  3. Step 3: Cross multiply
    105,445.99x = 145,517.07 × 57,703.78
  4. Step 4: Simplify right side
    105,445.99x = 8,396,884,993.52
  5. Step 5: Solve for x
    x = 8,396,884,993.52/105,445.99
  6. Step 6: Final answer
    x = 79,632.09

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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.