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Finding the Fourth Proportional to 83,605.70, 125,428.62 and 31,015.64

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Solution

The fourth proportional to 83,605.70, 125,428.62 and 31,015.64 is: 46,530.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,605.70 : 125,428.62 = 31,015.64 : x
  2. Step 2: Convert to fraction form
    83,605.70/125,428.62 = 31,015.64/x
  3. Step 3: Cross multiply
    83,605.70x = 125,428.62 × 31,015.64
  4. Step 4: Simplify right side
    83,605.70x = 3,890,248,923.62
  5. Step 5: Solve for x
    x = 3,890,248,923.62/83,605.70
  6. Step 6: Final answer
    x = 46,530.91

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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.