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Finding the Fourth Proportional to 93,115.50, 128,476.98 and 54,876.57

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Solution

The fourth proportional to 93,115.50, 128,476.98 and 54,876.57 is: 75,716.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,115.50 : 128,476.98 = 54,876.57 : x
  2. Step 2: Convert to fraction form
    93,115.50/128,476.98 = 54,876.57/x
  3. Step 3: Cross multiply
    93,115.50x = 128,476.98 × 54,876.57
  4. Step 4: Simplify right side
    93,115.50x = 7,050,375,986.36
  5. Step 5: Solve for x
    x = 7,050,375,986.36/93,115.50
  6. Step 6: Final answer
    x = 75,716.46

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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.