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Finding the Fourth Proportional to 93,412.54, 128,942.55 and 55,172.23

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Solution

The fourth proportional to 93,412.54, 128,942.55 and 55,172.23 is: 76,157.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,412.54 : 128,942.55 = 55,172.23 : x
  2. Step 2: Convert to fraction form
    93,412.54/128,942.55 = 55,172.23/x
  3. Step 3: Cross multiply
    93,412.54x = 128,942.55 × 55,172.23
  4. Step 4: Simplify right side
    93,412.54x = 7,114,048,025.39
  5. Step 5: Solve for x
    x = 7,114,048,025.39/93,412.54
  6. Step 6: Final answer
    x = 76,157.31

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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.