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Finding the Fourth Proportional to 74,020.20, 110,811.60 and 65,272.20

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Solution

The fourth proportional to 74,020.20, 110,811.60 and 65,272.20 is: 97,715.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,020.20 : 110,811.60 = 65,272.20 : x
  2. Step 2: Convert to fraction form
    74,020.20/110,811.60 = 65,272.20/x
  3. Step 3: Cross multiply
    74,020.20x = 110,811.60 × 65,272.20
  4. Step 4: Simplify right side
    74,020.20x = 7,232,916,917.52
  5. Step 5: Solve for x
    x = 7,232,916,917.52/74,020.20
  6. Step 6: Final answer
    x = 97,715.45

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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.