Home / 90,549.48-135,913.61-67,981.66

Finding the Fourth Proportional to 90,549.48, 135,913.61 and 67,981.66

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Solution

The fourth proportional to 90,549.48, 135,913.61 and 67,981.66 is: 102,039.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,549.48 : 135,913.61 = 67,981.66 : x
  2. Step 2: Convert to fraction form
    90,549.48/135,913.61 = 67,981.66/x
  3. Step 3: Cross multiply
    90,549.48x = 135,913.61 × 67,981.66
  4. Step 4: Simplify right side
    90,549.48x = 9,239,632,484.48
  5. Step 5: Solve for x
    x = 9,239,632,484.48/90,549.48
  6. Step 6: Final answer
    x = 102,039.60

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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.