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Finding the Fourth Proportional to 166,486, 249,729.24 and 67,990

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Solution

The fourth proportional to 166,486, 249,729.24 and 67,990 is: 101,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,486 : 249,729.24 = 67,990 : x
  2. Step 2: Convert to fraction form
    166,486/249,729.24 = 67,990/x
  3. Step 3: Cross multiply
    166,486x = 249,729.24 × 67,990
  4. Step 4: Simplify right side
    166,486x = 16,979,091,027.60
  5. Step 5: Solve for x
    x = 16,979,091,027.60/166,486
  6. Step 6: Final answer
    x = 101,985.10

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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.