Home / 165,986.20-249,011.70-66,129.40

Finding the Fourth Proportional to 165,986.20, 249,011.70 and 66,129.40

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Solution

The fourth proportional to 165,986.20, 249,011.70 and 66,129.40 is: 99,207.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,986.20 : 249,011.70 = 66,129.40 : x
  2. Step 2: Convert to fraction form
    165,986.20/249,011.70 = 66,129.40/x
  3. Step 3: Cross multiply
    165,986.20x = 249,011.70 × 66,129.40
  4. Step 4: Simplify right side
    165,986.20x = 16,466,994,313.98
  5. Step 5: Solve for x
    x = 16,466,994,313.98/165,986.20
  6. Step 6: Final answer
    x = 99,207.01

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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.