Home / 91,890.36-126,856.86-61,833.72

Finding the Fourth Proportional to 91,890.36, 126,856.86 and 61,833.72

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Solution

The fourth proportional to 91,890.36, 126,856.86 and 61,833.72 is: 85,362.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,890.36 : 126,856.86 = 61,833.72 : x
  2. Step 2: Convert to fraction form
    91,890.36/126,856.86 = 61,833.72/x
  3. Step 3: Cross multiply
    91,890.36x = 126,856.86 × 61,833.72
  4. Step 4: Simplify right side
    91,890.36x = 7,844,031,561.32
  5. Step 5: Solve for x
    x = 7,844,031,561.32/91,890.36
  6. Step 6: Final answer
    x = 85,362.94

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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.