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Finding the Fourth Proportional to 128,678.67, 192,804.62 and 91,052.24

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Solution

The fourth proportional to 128,678.67, 192,804.62 and 91,052.24 is: 136,427.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,678.67 : 192,804.62 = 91,052.24 : x
  2. Step 2: Convert to fraction form
    128,678.67/192,804.62 = 91,052.24/x
  3. Step 3: Cross multiply
    128,678.67x = 192,804.62 × 91,052.24
  4. Step 4: Simplify right side
    128,678.67x = 17,555,291,114.06
  5. Step 5: Solve for x
    x = 17,555,291,114.06/128,678.67
  6. Step 6: Final answer
    x = 136,427.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.