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Finding the Fourth Proportional to 170,139.69, 255,210.35 and 68,939.71

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Solution

The fourth proportional to 170,139.69, 255,210.35 and 68,939.71 is: 103,409.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,139.69 : 255,210.35 = 68,939.71 : x
  2. Step 2: Convert to fraction form
    170,139.69/255,210.35 = 68,939.71/x
  3. Step 3: Cross multiply
    170,139.69x = 255,210.35 × 68,939.71
  4. Step 4: Simplify right side
    170,139.69x = 17,594,126,535.27
  5. Step 5: Solve for x
    x = 17,594,126,535.27/170,139.69
  6. Step 6: Final answer
    x = 103,409.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.