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Finding the Fourth Proportional to 103,079.20, 154,602.60 and 36,509.80

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Solution

The fourth proportional to 103,079.20, 154,602.60 and 36,509.80 is: 54,758.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,079.20 : 154,602.60 = 36,509.80 : x
  2. Step 2: Convert to fraction form
    103,079.20/154,602.60 = 36,509.80/x
  3. Step 3: Cross multiply
    103,079.20x = 154,602.60 × 36,509.80
  4. Step 4: Simplify right side
    103,079.20x = 5,644,510,005.48
  5. Step 5: Solve for x
    x = 5,644,510,005.48/103,079.20
  6. Step 6: Final answer
    x = 54,758.96

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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.