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Finding the Fourth Proportional to 72,132.40, 108,198.60 and 71,095.60

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Solution

The fourth proportional to 72,132.40, 108,198.60 and 71,095.60 is: 106,643.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,132.40 : 108,198.60 = 71,095.60 : x
  2. Step 2: Convert to fraction form
    72,132.40/108,198.60 = 71,095.60/x
  3. Step 3: Cross multiply
    72,132.40x = 108,198.60 × 71,095.60
  4. Step 4: Simplify right side
    72,132.40x = 7,692,444,386.16
  5. Step 5: Solve for x
    x = 7,692,444,386.16/72,132.40
  6. Step 6: Final answer
    x = 106,643.40

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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.