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Finding the Fourth Proportional to 343,639.71, 515,336.01 and 118,939.23

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Solution

The fourth proportional to 343,639.71, 515,336.01 and 118,939.23 is: 178,366.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,639.71 : 515,336.01 = 118,939.23 : x
  2. Step 2: Convert to fraction form
    343,639.71/515,336.01 = 118,939.23/x
  3. Step 3: Cross multiply
    343,639.71x = 515,336.01 × 118,939.23
  4. Step 4: Simplify right side
    343,639.71x = 61,293,668,220.67
  5. Step 5: Solve for x
    x = 61,293,668,220.67/343,639.71
  6. Step 6: Final answer
    x = 178,366.08

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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.