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Finding the Fourth Proportional to 86,718.48, 119,756.52 and 74,069.52

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Solution

The fourth proportional to 86,718.48, 119,756.52 and 74,069.52 is: 102,288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,718.48 : 119,756.52 = 74,069.52 : x
  2. Step 2: Convert to fraction form
    86,718.48/119,756.52 = 74,069.52/x
  3. Step 3: Cross multiply
    86,718.48x = 119,756.52 × 74,069.52
  4. Step 4: Simplify right side
    86,718.48x = 8,870,307,953.27
  5. Step 5: Solve for x
    x = 8,870,307,953.27/86,718.48
  6. Step 6: Final answer
    x = 102,288.55

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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.