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Finding the Fourth Proportional to 268,487.90, 402,271.05 and 127,943.90

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Solution

The fourth proportional to 268,487.90, 402,271.05 and 127,943.90 is: 191,696.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,487.90 : 402,271.05 = 127,943.90 : x
  2. Step 2: Convert to fraction form
    268,487.90/402,271.05 = 127,943.90/x
  3. Step 3: Cross multiply
    268,487.90x = 402,271.05 × 127,943.90
  4. Step 4: Simplify right side
    268,487.90x = 51,468,126,994.10
  5. Step 5: Solve for x
    x = 51,468,126,994.10/268,487.90
  6. Step 6: Final answer
    x = 191,696.26

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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.