Home / 78,658.02-117,986.76-31,910.76

Finding the Fourth Proportional to 78,658.02, 117,986.76 and 31,910.76

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Solution

The fourth proportional to 78,658.02, 117,986.76 and 31,910.76 is: 47,866.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,658.02 : 117,986.76 = 31,910.76 : x
  2. Step 2: Convert to fraction form
    78,658.02/117,986.76 = 31,910.76/x
  3. Step 3: Cross multiply
    78,658.02x = 117,986.76 × 31,910.76
  4. Step 4: Simplify right side
    78,658.02x = 3,765,047,181.54
  5. Step 5: Solve for x
    x = 3,765,047,181.54/78,658.02
  6. Step 6: Final answer
    x = 47,866.03

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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.