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Finding the Fourth Proportional to 136,808.72, 205,284.12 and 103,518.88

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Solution

The fourth proportional to 136,808.72, 205,284.12 and 103,518.88 is: 155,332.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,808.72 : 205,284.12 = 103,518.88 : x
  2. Step 2: Convert to fraction form
    136,808.72/205,284.12 = 103,518.88/x
  3. Step 3: Cross multiply
    136,808.72x = 205,284.12 × 103,518.88
  4. Step 4: Simplify right side
    136,808.72x = 21,250,782,184.19
  5. Step 5: Solve for x
    x = 21,250,782,184.19/136,808.72
  6. Step 6: Final answer
    x = 155,332.07

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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.