Home / 191,738.40-287,604.90-86,557.20

Finding the Fourth Proportional to 191,738.40, 287,604.90 and 86,557.20

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Solution

The fourth proportional to 191,738.40, 287,604.90 and 86,557.20 is: 129,834.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,738.40 : 287,604.90 = 86,557.20 : x
  2. Step 2: Convert to fraction form
    191,738.40/287,604.90 = 86,557.20/x
  3. Step 3: Cross multiply
    191,738.40x = 287,604.90 × 86,557.20
  4. Step 4: Simplify right side
    191,738.40x = 24,894,274,850.28
  5. Step 5: Solve for x
    x = 24,894,274,850.28/191,738.40
  6. Step 6: Final answer
    x = 129,834.58

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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.