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Finding the Fourth Proportional to 162,139.54, 223,725.86 and 90,508

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Solution

The fourth proportional to 162,139.54, 223,725.86 and 90,508 is: 124,886.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,139.54 : 223,725.86 = 90,508 : x
  2. Step 2: Convert to fraction form
    162,139.54/223,725.86 = 90,508/x
  3. Step 3: Cross multiply
    162,139.54x = 223,725.86 × 90,508
  4. Step 4: Simplify right side
    162,139.54x = 20,248,980,136.88
  5. Step 5: Solve for x
    x = 20,248,980,136.88/162,139.54
  6. Step 6: Final answer
    x = 124,886.13

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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.