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Finding the Fourth Proportional to 132,647.68, 198,762.54 and 79,208.74

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Solution

The fourth proportional to 132,647.68, 198,762.54 and 79,208.74 is: 118,688.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,647.68 : 198,762.54 = 79,208.74 : x
  2. Step 2: Convert to fraction form
    132,647.68/198,762.54 = 79,208.74/x
  3. Step 3: Cross multiply
    132,647.68x = 198,762.54 × 79,208.74
  4. Step 4: Simplify right side
    132,647.68x = 15,743,730,352.60
  5. Step 5: Solve for x
    x = 15,743,730,352.60/132,647.68
  6. Step 6: Final answer
    x = 118,688.32

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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.