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Finding the Fourth Proportional to 166,189.70, 249,114.45 and 81,820.10

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Solution

The fourth proportional to 166,189.70, 249,114.45 and 81,820.10 is: 122,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,189.70 : 249,114.45 = 81,820.10 : x
  2. Step 2: Convert to fraction form
    166,189.70/249,114.45 = 81,820.10/x
  3. Step 3: Cross multiply
    166,189.70x = 249,114.45 × 81,820.10
  4. Step 4: Simplify right side
    166,189.70x = 20,382,569,210.45
  5. Step 5: Solve for x
    x = 20,382,569,210.45/166,189.70
  6. Step 6: Final answer
    x = 122,646.40

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1.5x scale

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.