Home / 128,511.40-192,795.90-49,618.60

Finding the Fourth Proportional to 128,511.40, 192,795.90 and 49,618.60

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Solution

The fourth proportional to 128,511.40, 192,795.90 and 49,618.60 is: 74,439.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,511.40 : 192,795.90 = 49,618.60 : x
  2. Step 2: Convert to fraction form
    128,511.40/192,795.90 = 49,618.60/x
  3. Step 3: Cross multiply
    128,511.40x = 192,795.90 × 49,618.60
  4. Step 4: Simplify right side
    128,511.40x = 9,566,262,643.74
  5. Step 5: Solve for x
    x = 9,566,262,643.74/128,511.40
  6. Step 6: Final answer
    x = 74,439.02

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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.