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Finding the Fourth Proportional to 122,812.50, 169,481.25 and 69,820.50

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Solution

The fourth proportional to 122,812.50, 169,481.25 and 69,820.50 is: 96,352.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,812.50 : 169,481.25 = 69,820.50 : x
  2. Step 2: Convert to fraction form
    122,812.50/169,481.25 = 69,820.50/x
  3. Step 3: Cross multiply
    122,812.50x = 169,481.25 × 69,820.50
  4. Step 4: Simplify right side
    122,812.50x = 11,833,265,615.63
  5. Step 5: Solve for x
    x = 11,833,265,615.63/122,812.50
  6. Step 6: Final answer
    x = 96,352.29

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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.