Home / 128,631.17-193,012.56-61,239.39

Finding the Fourth Proportional to 128,631.17, 193,012.56 and 61,239.39

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Solution

The fourth proportional to 128,631.17, 193,012.56 and 61,239.39 is: 91,890.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,631.17 : 193,012.56 = 61,239.39 : x
  2. Step 2: Convert to fraction form
    128,631.17/193,012.56 = 61,239.39/x
  3. Step 3: Cross multiply
    128,631.17x = 193,012.56 × 61,239.39
  4. Step 4: Simplify right side
    128,631.17x = 11,819,971,436.74
  5. Step 5: Solve for x
    x = 11,819,971,436.74/128,631.17
  6. Step 6: Final answer
    x = 91,890.42

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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.