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Finding the Fourth Proportional to 136,602.20, 204,903.30 and 91,987.40

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Solution

The fourth proportional to 136,602.20, 204,903.30 and 91,987.40 is: 137,981.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,602.20 : 204,903.30 = 91,987.40 : x
  2. Step 2: Convert to fraction form
    136,602.20/204,903.30 = 91,987.40/x
  3. Step 3: Cross multiply
    136,602.20x = 204,903.30 × 91,987.40
  4. Step 4: Simplify right side
    136,602.20x = 18,848,521,818.42
  5. Step 5: Solve for x
    x = 18,848,521,818.42/136,602.20
  6. Step 6: Final answer
    x = 137,981.10

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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.