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Finding the Fourth Proportional to 169,943.40, 254,915.10 and 91,211.40

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Solution

The fourth proportional to 169,943.40, 254,915.10 and 91,211.40 is: 136,817.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,943.40 : 254,915.10 = 91,211.40 : x
  2. Step 2: Convert to fraction form
    169,943.40/254,915.10 = 91,211.40/x
  3. Step 3: Cross multiply
    169,943.40x = 254,915.10 × 91,211.40
  4. Step 4: Simplify right side
    169,943.40x = 23,251,163,152.14
  5. Step 5: Solve for x
    x = 23,251,163,152.14/169,943.40
  6. Step 6: Final answer
    x = 136,817.10

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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.