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Finding the Fourth Proportional to 136,491.58, 188,258.13 and 90,468

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Solution

The fourth proportional to 136,491.58, 188,258.13 and 90,468 is: 124,779.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,491.58 : 188,258.13 = 90,468 : x
  2. Step 2: Convert to fraction form
    136,491.58/188,258.13 = 90,468/x
  3. Step 3: Cross multiply
    136,491.58x = 188,258.13 × 90,468
  4. Step 4: Simplify right side
    136,491.58x = 17,031,336,504.84
  5. Step 5: Solve for x
    x = 17,031,336,504.84/136,491.58
  6. Step 6: Final answer
    x = 124,779.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.