Home / 78,659.02-117,988.26-31,911.76

Finding the Fourth Proportional to 78,659.02, 117,988.26 and 31,911.76

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Solution

The fourth proportional to 78,659.02, 117,988.26 and 31,911.76 is: 47,867.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,659.02 : 117,988.26 = 31,911.76 : x
  2. Step 2: Convert to fraction form
    78,659.02/117,988.26 = 31,911.76/x
  3. Step 3: Cross multiply
    78,659.02x = 117,988.26 × 31,911.76
  4. Step 4: Simplify right side
    78,659.02x = 3,765,213,035.94
  5. Step 5: Solve for x
    x = 3,765,213,035.94/78,659.02
  6. Step 6: Final answer
    x = 47,867.53

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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.