Home / 78,024.12-117,050.78-31,280.68

Finding the Fourth Proportional to 78,024.12, 117,050.78 and 31,280.68

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Solution

The fourth proportional to 78,024.12, 117,050.78 and 31,280.68 is: 46,926.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,024.12 : 117,050.78 = 31,280.68 : x
  2. Step 2: Convert to fraction form
    78,024.12/117,050.78 = 31,280.68/x
  3. Step 3: Cross multiply
    78,024.12x = 117,050.78 × 31,280.68
  4. Step 4: Simplify right side
    78,024.12x = 3,661,427,992.93
  5. Step 5: Solve for x
    x = 3,661,427,992.93/78,024.12
  6. Step 6: Final answer
    x = 46,926.87

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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.