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Finding the Fourth Proportional to 51,196.87, 70,643.12 and 28,530.89

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Solution

The fourth proportional to 51,196.87, 70,643.12 and 28,530.89 is: 39,367.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,196.87 : 70,643.12 = 28,530.89 : x
  2. Step 2: Convert to fraction form
    51,196.87/70,643.12 = 28,530.89/x
  3. Step 3: Cross multiply
    51,196.87x = 70,643.12 × 28,530.89
  4. Step 4: Simplify right side
    51,196.87x = 2,015,510,943.32
  5. Step 5: Solve for x
    x = 2,015,510,943.32/51,196.87
  6. Step 6: Final answer
    x = 39,367.85

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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.