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Finding the Fourth Proportional to 90,135.86, 135,130.86 and 55,063.66

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Solution

The fourth proportional to 90,135.86, 135,130.86 and 55,063.66 is: 82,550.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,135.86 : 135,130.86 = 55,063.66 : x
  2. Step 2: Convert to fraction form
    90,135.86/135,130.86 = 55,063.66/x
  3. Step 3: Cross multiply
    90,135.86x = 135,130.86 × 55,063.66
  4. Step 4: Simplify right side
    90,135.86x = 7,440,799,730.55
  5. Step 5: Solve for x
    x = 7,440,799,730.55/90,135.86
  6. Step 6: Final answer
    x = 82,550.94

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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.