Home / 138,597.07-191,270.45-78,166.44

Finding the Fourth Proportional to 138,597.07, 191,270.45 and 78,166.44

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Solution

The fourth proportional to 138,597.07, 191,270.45 and 78,166.44 is: 107,873.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,597.07 : 191,270.45 = 78,166.44 : x
  2. Step 2: Convert to fraction form
    138,597.07/191,270.45 = 78,166.44/x
  3. Step 3: Cross multiply
    138,597.07x = 191,270.45 × 78,166.44
  4. Step 4: Simplify right side
    138,597.07x = 14,950,930,153.70
  5. Step 5: Solve for x
    x = 14,950,930,153.70/138,597.07
  6. Step 6: Final answer
    x = 107,873.35

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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.