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Finding the Fourth Proportional to 93,470.78, 128,986.04 and 51,029.66

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Solution

The fourth proportional to 93,470.78, 128,986.04 and 51,029.66 is: 70,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,470.78 : 128,986.04 = 51,029.66 : x
  2. Step 2: Convert to fraction form
    93,470.78/128,986.04 = 51,029.66/x
  3. Step 3: Cross multiply
    93,470.78x = 128,986.04 × 51,029.66
  4. Step 4: Simplify right side
    93,470.78x = 6,582,113,765.95
  5. Step 5: Solve for x
    x = 6,582,113,765.95/93,470.78
  6. Step 6: Final answer
    x = 70,418.95

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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.