Home / 98,501.60-135,839.94-78,424.76

Finding the Fourth Proportional to 98,501.60, 135,839.94 and 78,424.76

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Solution

The fourth proportional to 98,501.60, 135,839.94 and 78,424.76 is: 108,152.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,501.60 : 135,839.94 = 78,424.76 : x
  2. Step 2: Convert to fraction form
    98,501.60/135,839.94 = 78,424.76/x
  3. Step 3: Cross multiply
    98,501.60x = 135,839.94 × 78,424.76
  4. Step 4: Simplify right side
    98,501.60x = 10,653,214,692.91
  5. Step 5: Solve for x
    x = 10,653,214,692.91/98,501.60
  6. Step 6: Final answer
    x = 108,152.71

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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.