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Finding the Fourth Proportional to 122,442.84, 168,989.69 and 74,723.92

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Solution

The fourth proportional to 122,442.84, 168,989.69 and 74,723.92 is: 103,130.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,442.84 : 168,989.69 = 74,723.92 : x
  2. Step 2: Convert to fraction form
    122,442.84/168,989.69 = 74,723.92/x
  3. Step 3: Cross multiply
    122,442.84x = 168,989.69 × 74,723.92
  4. Step 4: Simplify right side
    122,442.84x = 12,627,571,840.72
  5. Step 5: Solve for x
    x = 12,627,571,840.72/122,442.84
  6. Step 6: Final answer
    x = 103,130.34

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1.5x scale

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.