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Finding the Fourth Proportional to 91,178.60, 136,754.22 and 28,841

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Solution

The fourth proportional to 91,178.60, 136,754.22 and 28,841 is: 43,257.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,178.60 : 136,754.22 = 28,841 : x
  2. Step 2: Convert to fraction form
    91,178.60/136,754.22 = 28,841/x
  3. Step 3: Cross multiply
    91,178.60x = 136,754.22 × 28,841
  4. Step 4: Simplify right side
    91,178.60x = 3,944,128,459.02
  5. Step 5: Solve for x
    x = 3,944,128,459.02/91,178.60
  6. Step 6: Final answer
    x = 43,257.17

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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.