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Finding the Fourth Proportional to 85,549.60, 128,178.60 and 73,010.80

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Solution

The fourth proportional to 85,549.60, 128,178.60 and 73,010.80 is: 109,391.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,549.60 : 128,178.60 = 73,010.80 : x
  2. Step 2: Convert to fraction form
    85,549.60/128,178.60 = 73,010.80/x
  3. Step 3: Cross multiply
    85,549.60x = 128,178.60 × 73,010.80
  4. Step 4: Simplify right side
    85,549.60x = 9,358,422,128.88
  5. Step 5: Solve for x
    x = 9,358,422,128.88/85,549.60
  6. Step 6: Final answer
    x = 109,391.77

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.