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Finding the Fourth Proportional to 93,458.92, 128,958.10 and 55,213.15

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Solution

The fourth proportional to 93,458.92, 128,958.10 and 55,213.15 is: 76,185.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,458.92 : 128,958.10 = 55,213.15 : x
  2. Step 2: Convert to fraction form
    93,458.92/128,958.10 = 55,213.15/x
  3. Step 3: Cross multiply
    93,458.92x = 128,958.10 × 55,213.15
  4. Step 4: Simplify right side
    93,458.92x = 7,120,182,919.02
  5. Step 5: Solve for x
    x = 7,120,182,919.02/93,458.92
  6. Step 6: Final answer
    x = 76,185.16

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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.