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Finding the Fourth Proportional to 128,334.54, 177,123.54 and 74,650.68

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Solution

The fourth proportional to 128,334.54, 177,123.54 and 74,650.68 is: 103,030.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,334.54 : 177,123.54 = 74,650.68 : x
  2. Step 2: Convert to fraction form
    128,334.54/177,123.54 = 74,650.68/x
  3. Step 3: Cross multiply
    128,334.54x = 177,123.54 × 74,650.68
  4. Step 4: Simplify right side
    128,334.54x = 13,222,392,705.01
  5. Step 5: Solve for x
    x = 13,222,392,705.01/128,334.54
  6. Step 6: Final answer
    x = 103,030.66

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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.