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Finding the Fourth Proportional to 51,355.56, 70,863.56 and 28,691.70

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Solution

The fourth proportional to 51,355.56, 70,863.56 and 28,691.70 is: 39,590.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,355.56 : 70,863.56 = 28,691.70 : x
  2. Step 2: Convert to fraction form
    51,355.56/70,863.56 = 28,691.70/x
  3. Step 3: Cross multiply
    51,355.56x = 70,863.56 × 28,691.70
  4. Step 4: Simplify right side
    51,355.56x = 2,033,196,004.45
  5. Step 5: Solve for x
    x = 2,033,196,004.45/51,355.56
  6. Step 6: Final answer
    x = 39,590.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.