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Finding the Fourth Proportional to 93,129.88, 128,522.02 and 57,340.54

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Solution

The fourth proportional to 93,129.88, 128,522.02 and 57,340.54 is: 79,131.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,129.88 : 128,522.02 = 57,340.54 : x
  2. Step 2: Convert to fraction form
    93,129.88/128,522.02 = 57,340.54/x
  3. Step 3: Cross multiply
    93,129.88x = 128,522.02 × 57,340.54
  4. Step 4: Simplify right side
    93,129.88x = 7,369,521,420.68
  5. Step 5: Solve for x
    x = 7,369,521,420.68/93,129.88
  6. Step 6: Final answer
    x = 79,131.65

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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.