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Finding the Fourth Proportional to 128,345.74, 177,046.02 and 74,624.82

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Solution

The fourth proportional to 128,345.74, 177,046.02 and 74,624.82 is: 102,940.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,345.74 : 177,046.02 = 74,624.82 : x
  2. Step 2: Convert to fraction form
    128,345.74/177,046.02 = 74,624.82/x
  3. Step 3: Cross multiply
    128,345.74x = 177,046.02 × 74,624.82
  4. Step 4: Simplify right side
    128,345.74x = 13,212,027,374.22
  5. Step 5: Solve for x
    x = 13,212,027,374.22/128,345.74
  6. Step 6: Final answer
    x = 102,940.91

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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.