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Finding the Fourth Proportional to 122,710.67, 169,271.56 and 73,639.60

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Solution

The fourth proportional to 122,710.67, 169,271.56 and 73,639.60 is: 101,581.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,710.67 : 169,271.56 = 73,639.60 : x
  2. Step 2: Convert to fraction form
    122,710.67/169,271.56 = 73,639.60/x
  3. Step 3: Cross multiply
    122,710.67x = 169,271.56 × 73,639.60
  4. Step 4: Simplify right side
    122,710.67x = 12,465,089,969.78
  5. Step 5: Solve for x
    x = 12,465,089,969.78/122,710.67
  6. Step 6: Final answer
    x = 101,581.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.