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Finding the Fourth Proportional to 166,431.80, 249,647.70 and 61,326.20

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Solution

The fourth proportional to 166,431.80, 249,647.70 and 61,326.20 is: 91,989.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,431.80 : 249,647.70 = 61,326.20 : x
  2. Step 2: Convert to fraction form
    166,431.80/249,647.70 = 61,326.20/x
  3. Step 3: Cross multiply
    166,431.80x = 249,647.70 × 61,326.20
  4. Step 4: Simplify right side
    166,431.80x = 15,309,944,779.74
  5. Step 5: Solve for x
    x = 15,309,944,779.74/166,431.80
  6. Step 6: Final answer
    x = 91,989.30

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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.