Home / 78,032.70-117,048.12-31,318.38

Finding the Fourth Proportional to 78,032.70, 117,048.12 and 31,318.38

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Solution

The fourth proportional to 78,032.70, 117,048.12 and 31,318.38 is: 46,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,032.70 : 117,048.12 = 31,318.38 : x
  2. Step 2: Convert to fraction form
    78,032.70/117,048.12 = 31,318.38/x
  3. Step 3: Cross multiply
    78,032.70x = 117,048.12 × 31,318.38
  4. Step 4: Simplify right side
    78,032.70x = 3,665,757,500.45
  5. Step 5: Solve for x
    x = 3,665,757,500.45/78,032.70
  6. Step 6: Final answer
    x = 46,977.20

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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.