Home / 189,720.87-261,818.56-103,685.18

Finding the Fourth Proportional to 189,720.87, 261,818.56 and 103,685.18

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Solution

The fourth proportional to 189,720.87, 261,818.56 and 103,685.18 is: 143,087.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,720.87 : 261,818.56 = 103,685.18 : x
  2. Step 2: Convert to fraction form
    189,720.87/261,818.56 = 103,685.18/x
  3. Step 3: Cross multiply
    189,720.87x = 261,818.56 × 103,685.18
  4. Step 4: Simplify right side
    189,720.87x = 27,146,704,002.51
  5. Step 5: Solve for x
    x = 27,146,704,002.51/189,720.87
  6. Step 6: Final answer
    x = 143,087.60

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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.