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Finding the Fourth Proportional to 159,349.86, 219,853.15 and 90,427.90

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Solution

The fourth proportional to 159,349.86, 219,853.15 and 90,427.90 is: 124,762.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,349.86 : 219,853.15 = 90,427.90 : x
  2. Step 2: Convert to fraction form
    159,349.86/219,853.15 = 90,427.90/x
  3. Step 3: Cross multiply
    159,349.86x = 219,853.15 × 90,427.90
  4. Step 4: Simplify right side
    159,349.86x = 19,880,858,662.89
  5. Step 5: Solve for x
    x = 19,880,858,662.89/159,349.86
  6. Step 6: Final answer
    x = 124,762.32

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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.