Home / 138,559.76-191,196.23-78,126.81

Finding the Fourth Proportional to 138,559.76, 191,196.23 and 78,126.81

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Solution

The fourth proportional to 138,559.76, 191,196.23 and 78,126.81 is: 107,805.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,559.76 : 191,196.23 = 78,126.81 : x
  2. Step 2: Convert to fraction form
    138,559.76/191,196.23 = 78,126.81/x
  3. Step 3: Cross multiply
    138,559.76x = 191,196.23 × 78,126.81
  4. Step 4: Simplify right side
    138,559.76x = 14,937,551,533.93
  5. Step 5: Solve for x
    x = 14,937,551,533.93/138,559.76
  6. Step 6: Final answer
    x = 107,805.84

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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.