Home / 78,621.21-108,497.19-42,811.47

Finding the Fourth Proportional to 78,621.21, 108,497.19 and 42,811.47

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Solution

The fourth proportional to 78,621.21, 108,497.19 and 42,811.47 is: 59,079.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,621.21 : 108,497.19 = 42,811.47 : x
  2. Step 2: Convert to fraction form
    78,621.21/108,497.19 = 42,811.47/x
  3. Step 3: Cross multiply
    78,621.21x = 108,497.19 × 42,811.47
  4. Step 4: Simplify right side
    78,621.21x = 4,644,924,194.77
  5. Step 5: Solve for x
    x = 4,644,924,194.77/78,621.21
  6. Step 6: Final answer
    x = 59,079.79

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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.