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Finding the Fourth Proportional to 136,719.40, 205,078.50 and 36,889.74

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Solution

The fourth proportional to 136,719.40, 205,078.50 and 36,889.74 is: 55,334.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,719.40 : 205,078.50 = 36,889.74 : x
  2. Step 2: Convert to fraction form
    136,719.40/205,078.50 = 36,889.74/x
  3. Step 3: Cross multiply
    136,719.40x = 205,078.50 × 36,889.74
  4. Step 4: Simplify right side
    136,719.40x = 7,565,292,544.59
  5. Step 5: Solve for x
    x = 7,565,292,544.59/136,719.40
  6. Step 6: Final answer
    x = 55,334.45

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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.