Home / 122,688-169,270.56-74,917.44

Finding the Fourth Proportional to 122,688, 169,270.56 and 74,917.44

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Solution

The fourth proportional to 122,688, 169,270.56 and 74,917.44 is: 103,362.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,688 : 169,270.56 = 74,917.44 : x
  2. Step 2: Convert to fraction form
    122,688/169,270.56 = 74,917.44/x
  3. Step 3: Cross multiply
    122,688x = 169,270.56 × 74,917.44
  4. Step 4: Simplify right side
    122,688x = 12,681,317,022.57
  5. Step 5: Solve for x
    x = 12,681,317,022.57/122,688
  6. Step 6: Final answer
    x = 103,362.33

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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.