Home / 189,385.90-261,352.38-121,402.84

Finding the Fourth Proportional to 189,385.90, 261,352.38 and 121,402.84

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Solution

The fourth proportional to 189,385.90, 261,352.38 and 121,402.84 is: 167,535.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,385.90 : 261,352.38 = 121,402.84 : x
  2. Step 2: Convert to fraction form
    189,385.90/261,352.38 = 121,402.84/x
  3. Step 3: Cross multiply
    189,385.90x = 261,352.38 × 121,402.84
  4. Step 4: Simplify right side
    189,385.90x = 31,728,921,172.76
  5. Step 5: Solve for x
    x = 31,728,921,172.76/189,385.90
  6. Step 6: Final answer
    x = 167,535.82

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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.