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Finding the Fourth Proportional to 122,007.21, 168,360.75 and 74,255.28

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Solution

The fourth proportional to 122,007.21, 168,360.75 and 74,255.28 is: 102,466.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,007.21 : 168,360.75 = 74,255.28 : x
  2. Step 2: Convert to fraction form
    122,007.21/168,360.75 = 74,255.28/x
  3. Step 3: Cross multiply
    122,007.21x = 168,360.75 × 74,255.28
  4. Step 4: Simplify right side
    122,007.21x = 12,501,674,632.26
  5. Step 5: Solve for x
    x = 12,501,674,632.26/122,007.21
  6. Step 6: Final answer
    x = 102,466.69

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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.