Home / 139,405.32-209,115.90-39,557.61

Finding the Fourth Proportional to 139,405.32, 209,115.90 and 39,557.61

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Solution

The fourth proportional to 139,405.32, 209,115.90 and 39,557.61 is: 59,338.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,405.32 : 209,115.90 = 39,557.61 : x
  2. Step 2: Convert to fraction form
    139,405.32/209,115.90 = 39,557.61/x
  3. Step 3: Cross multiply
    139,405.32x = 209,115.90 × 39,557.61
  4. Step 4: Simplify right side
    139,405.32x = 8,272,125,217.00
  5. Step 5: Solve for x
    x = 8,272,125,217.00/139,405.32
  6. Step 6: Final answer
    x = 59,338.66

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1.5x scale

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.