Home / 189,666.84-261,758.34-103,638.90

Finding the Fourth Proportional to 189,666.84, 261,758.34 and 103,638.90

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Solution

The fourth proportional to 189,666.84, 261,758.34 and 103,638.90 is: 143,031.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,666.84 : 261,758.34 = 103,638.90 : x
  2. Step 2: Convert to fraction form
    189,666.84/261,758.34 = 103,638.90/x
  3. Step 3: Cross multiply
    189,666.84x = 261,758.34 × 103,638.90
  4. Step 4: Simplify right side
    189,666.84x = 27,128,346,423.43
  5. Step 5: Solve for x
    x = 27,128,346,423.43/189,666.84
  6. Step 6: Final answer
    x = 143,031.57

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1.5x scale

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.