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Finding the Fourth Proportional to 92,908.31, 128,215.83 and 52,621.47

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Solution

The fourth proportional to 92,908.31, 128,215.83 and 52,621.47 is: 72,618.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,908.31 : 128,215.83 = 52,621.47 : x
  2. Step 2: Convert to fraction form
    92,908.31/128,215.83 = 52,621.47/x
  3. Step 3: Cross multiply
    92,908.31x = 128,215.83 × 52,621.47
  4. Step 4: Simplify right side
    92,908.31x = 6,746,905,451.87
  5. Step 5: Solve for x
    x = 6,746,905,451.87/92,908.31
  6. Step 6: Final answer
    x = 72,618.97

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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.