Home / 78,210.50-107,811.06-47,939.72

Finding the Fourth Proportional to 78,210.50, 107,811.06 and 47,939.72

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Solution

The fourth proportional to 78,210.50, 107,811.06 and 47,939.72 is: 66,083.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,210.50 : 107,811.06 = 47,939.72 : x
  2. Step 2: Convert to fraction form
    78,210.50/107,811.06 = 47,939.72/x
  3. Step 3: Cross multiply
    78,210.50x = 107,811.06 × 47,939.72
  4. Step 4: Simplify right side
    78,210.50x = 5,168,432,029.30
  5. Step 5: Solve for x
    x = 5,168,432,029.30/78,210.50
  6. Step 6: Final answer
    x = 66,083.61

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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.