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Finding the Fourth Proportional to 86,651.71, 119,582.53 and 47,889.87

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Solution

The fourth proportional to 86,651.71, 119,582.53 and 47,889.87 is: 66,089.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,651.71 : 119,582.53 = 47,889.87 : x
  2. Step 2: Convert to fraction form
    86,651.71/119,582.53 = 47,889.87/x
  3. Step 3: Cross multiply
    86,651.71x = 119,582.53 × 47,889.87
  4. Step 4: Simplify right side
    86,651.71x = 5,726,791,247.81
  5. Step 5: Solve for x
    x = 5,726,791,247.81/86,651.71
  6. Step 6: Final answer
    x = 66,089.77

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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.