Home / 139,795.90-209,543.02-68,635.78

Finding the Fourth Proportional to 139,795.90, 209,543.02 and 68,635.78

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Solution

The fourth proportional to 139,795.90, 209,543.02 and 68,635.78 is: 102,879.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,795.90 : 209,543.02 = 68,635.78 : x
  2. Step 2: Convert to fraction form
    139,795.90/209,543.02 = 68,635.78/x
  3. Step 3: Cross multiply
    139,795.90x = 209,543.02 × 68,635.78
  4. Step 4: Simplify right side
    139,795.90x = 14,382,148,621.26
  5. Step 5: Solve for x
    x = 14,382,148,621.26/139,795.90
  6. Step 6: Final answer
    x = 102,879.62

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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.