Home / 189,681.12-261,756.84-103,638.21

Finding the Fourth Proportional to 189,681.12, 261,756.84 and 103,638.21

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Solution

The fourth proportional to 189,681.12, 261,756.84 and 103,638.21 is: 143,019.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,681.12 : 261,756.84 = 103,638.21 : x
  2. Step 2: Convert to fraction form
    189,681.12/261,756.84 = 103,638.21/x
  3. Step 3: Cross multiply
    189,681.12x = 261,756.84 × 103,638.21
  4. Step 4: Simplify right side
    189,681.12x = 27,128,010,352.86
  5. Step 5: Solve for x
    x = 27,128,010,352.86/189,681.12
  6. Step 6: Final answer
    x = 143,019.03

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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.