Home / 105,387.20-145,434.24-57,640.96

Finding the Fourth Proportional to 105,387.20, 145,434.24 and 57,640.96

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Solution

The fourth proportional to 105,387.20, 145,434.24 and 57,640.96 is: 79,544.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,387.20 : 145,434.24 = 57,640.96 : x
  2. Step 2: Convert to fraction form
    105,387.20/145,434.24 = 57,640.96/x
  3. Step 3: Cross multiply
    105,387.20x = 145,434.24 × 57,640.96
  4. Step 4: Simplify right side
    105,387.20x = 8,382,969,210.47
  5. Step 5: Solve for x
    x = 8,382,969,210.47/105,387.20
  6. Step 6: Final answer
    x = 79,544.47

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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.