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Finding the Fourth Proportional to 90,539.66, 135,809.52 and 34,379.82

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Solution

The fourth proportional to 90,539.66, 135,809.52 and 34,379.82 is: 51,569.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,539.66 : 135,809.52 = 34,379.82 : x
  2. Step 2: Convert to fraction form
    90,539.66/135,809.52 = 34,379.82/x
  3. Step 3: Cross multiply
    90,539.66x = 135,809.52 × 34,379.82
  4. Step 4: Simplify right side
    90,539.66x = 4,669,106,851.89
  5. Step 5: Solve for x
    x = 4,669,106,851.89/90,539.66
  6. Step 6: Final answer
    x = 51,569.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.