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Finding the Fourth Proportional to 86,912.91, 119,941.52 and 56,717.55

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Solution

The fourth proportional to 86,912.91, 119,941.52 and 56,717.55 is: 78,271.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,912.91 : 119,941.52 = 56,717.55 : x
  2. Step 2: Convert to fraction form
    86,912.91/119,941.52 = 56,717.55/x
  3. Step 3: Cross multiply
    86,912.91x = 119,941.52 × 56,717.55
  4. Step 4: Simplify right side
    86,912.91x = 6,802,788,874.09
  5. Step 5: Solve for x
    x = 6,802,788,874.09/86,912.91
  6. Step 6: Final answer
    x = 78,271.33

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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.