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Finding the Fourth Proportional to 90,117.99, 124,357.80 and 49,829.31

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Solution

The fourth proportional to 90,117.99, 124,357.80 and 49,829.31 is: 68,761.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,117.99 : 124,357.80 = 49,829.31 : x
  2. Step 2: Convert to fraction form
    90,117.99/124,357.80 = 49,829.31/x
  3. Step 3: Cross multiply
    90,117.99x = 124,357.80 × 49,829.31
  4. Step 4: Simplify right side
    90,117.99x = 6,196,663,367.12
  5. Step 5: Solve for x
    x = 6,196,663,367.12/90,117.99
  6. Step 6: Final answer
    x = 68,761.67

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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.