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Finding the Fourth Proportional to 93,455.24, 128,971.86 and 55,728.68

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Solution

The fourth proportional to 93,455.24, 128,971.86 and 55,728.68 is: 76,907.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,455.24 : 128,971.86 = 55,728.68 : x
  2. Step 2: Convert to fraction form
    93,455.24/128,971.86 = 55,728.68/x
  3. Step 3: Cross multiply
    93,455.24x = 128,971.86 × 55,728.68
  4. Step 4: Simplify right side
    93,455.24x = 7,187,431,514.94
  5. Step 5: Solve for x
    x = 7,187,431,514.94/93,455.24
  6. Step 6: Final answer
    x = 76,907.74

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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.