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Finding the Fourth Proportional to 93,067.85, 128,478.25 and 57,288.53

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Solution

The fourth proportional to 93,067.85, 128,478.25 and 57,288.53 is: 79,085.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,067.85 : 128,478.25 = 57,288.53 : x
  2. Step 2: Convert to fraction form
    93,067.85/128,478.25 = 57,288.53/x
  3. Step 3: Cross multiply
    93,067.85x = 128,478.25 × 57,288.53
  4. Step 4: Simplify right side
    93,067.85x = 7,360,330,472.28
  5. Step 5: Solve for x
    x = 7,360,330,472.28/93,067.85
  6. Step 6: Final answer
    x = 79,085.64

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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.