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Finding the Fourth Proportional to 268,710.90, 402,969.15 and 108,719.70

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Solution

The fourth proportional to 268,710.90, 402,969.15 and 108,719.70 is: 163,040.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,710.90 : 402,969.15 = 108,719.70 : x
  2. Step 2: Convert to fraction form
    268,710.90/402,969.15 = 108,719.70/x
  3. Step 3: Cross multiply
    268,710.90x = 402,969.15 × 108,719.70
  4. Step 4: Simplify right side
    268,710.90x = 43,810,685,097.26
  5. Step 5: Solve for x
    x = 43,810,685,097.26/268,710.90
  6. Step 6: Final answer
    x = 163,040.22

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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.