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Finding the Fourth Proportional to 178,616, 246,490.08 and 99,128

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Solution

The fourth proportional to 178,616, 246,490.08 and 99,128 is: 136,796.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,616 : 246,490.08 = 99,128 : x
  2. Step 2: Convert to fraction form
    178,616/246,490.08 = 99,128/x
  3. Step 3: Cross multiply
    178,616x = 246,490.08 × 99,128
  4. Step 4: Simplify right side
    178,616x = 24,434,068,650.24
  5. Step 5: Solve for x
    x = 24,434,068,650.24/178,616
  6. Step 6: Final answer
    x = 136,796.64

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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.