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Finding the Fourth Proportional to 86,730.78, 119,664.18 and 54,468.90

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Solution

The fourth proportional to 86,730.78, 119,664.18 and 54,468.90 is: 75,151.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,730.78 : 119,664.18 = 54,468.90 : x
  2. Step 2: Convert to fraction form
    86,730.78/119,664.18 = 54,468.90/x
  3. Step 3: Cross multiply
    86,730.78x = 119,664.18 × 54,468.90
  4. Step 4: Simplify right side
    86,730.78x = 6,517,976,254.00
  5. Step 5: Solve for x
    x = 6,517,976,254.00/86,730.78
  6. Step 6: Final answer
    x = 75,151.82

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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.