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Finding the Fourth Proportional to 122,721.31, 169,349.21 and 69,003.12

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Solution

The fourth proportional to 122,721.31, 169,349.21 and 69,003.12 is: 95,220.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,721.31 : 169,349.21 = 69,003.12 : x
  2. Step 2: Convert to fraction form
    122,721.31/169,349.21 = 69,003.12/x
  3. Step 3: Cross multiply
    122,721.31x = 169,349.21 × 69,003.12
  4. Step 4: Simplify right side
    122,721.31x = 11,685,624,408.34
  5. Step 5: Solve for x
    x = 11,685,624,408.34/122,721.31
  6. Step 6: Final answer
    x = 95,220.82

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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.