Home / 128,357.04-192,375-61,779.36

Finding the Fourth Proportional to 128,357.04, 192,375 and 61,779.36

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Solution

The fourth proportional to 128,357.04, 192,375 and 61,779.36 is: 92,591.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,357.04 : 192,375 = 61,779.36 : x
  2. Step 2: Convert to fraction form
    128,357.04/192,375 = 61,779.36/x
  3. Step 3: Cross multiply
    128,357.04x = 192,375 × 61,779.36
  4. Step 4: Simplify right side
    128,357.04x = 11,884,804,380
  5. Step 5: Solve for x
    x = 11,884,804,380/128,357.04
  6. Step 6: Final answer
    x = 92,591.76

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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.