Home / 105,415.38-145,476.84-57,668.76

Finding the Fourth Proportional to 105,415.38, 145,476.84 and 57,668.76

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Solution

The fourth proportional to 105,415.38, 145,476.84 and 57,668.76 is: 79,584.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,415.38 : 145,476.84 = 57,668.76 : x
  2. Step 2: Convert to fraction form
    105,415.38/145,476.84 = 57,668.76/x
  3. Step 3: Cross multiply
    105,415.38x = 145,476.84 × 57,668.76
  4. Step 4: Simplify right side
    105,415.38x = 8,389,468,971.52
  5. Step 5: Solve for x
    x = 8,389,468,971.52/105,415.38
  6. Step 6: Final answer
    x = 79,584.87

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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.