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Finding the Fourth Proportional to 86,390.70, 119,178.42 and 50,558.52

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Solution

The fourth proportional to 86,390.70, 119,178.42 and 50,558.52 is: 69,746.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,390.70 : 119,178.42 = 50,558.52 : x
  2. Step 2: Convert to fraction form
    86,390.70/119,178.42 = 50,558.52/x
  3. Step 3: Cross multiply
    86,390.70x = 119,178.42 × 50,558.52
  4. Step 4: Simplify right side
    86,390.70x = 6,025,484,531.14
  5. Step 5: Solve for x
    x = 6,025,484,531.14/86,390.70
  6. Step 6: Final answer
    x = 69,746.91

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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.