Home / 90,778.39-125,243.42-64,915.09

Finding the Fourth Proportional to 90,778.39, 125,243.42 and 64,915.09

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Solution

The fourth proportional to 90,778.39, 125,243.42 and 64,915.09 is: 89,560.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,778.39 : 125,243.42 = 64,915.09 : x
  2. Step 2: Convert to fraction form
    90,778.39/125,243.42 = 64,915.09/x
  3. Step 3: Cross multiply
    90,778.39x = 125,243.42 × 64,915.09
  4. Step 4: Simplify right side
    90,778.39x = 8,130,187,881.21
  5. Step 5: Solve for x
    x = 8,130,187,881.21/90,778.39
  6. Step 6: Final answer
    x = 89,560.83

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1.5x scale

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.