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Finding the Fourth Proportional to 90,059.58, 135,040.77 and 63,815.58

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Solution

The fourth proportional to 90,059.58, 135,040.77 and 63,815.58 is: 95,688.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,059.58 : 135,040.77 = 63,815.58 : x
  2. Step 2: Convert to fraction form
    90,059.58/135,040.77 = 63,815.58/x
  3. Step 3: Cross multiply
    90,059.58x = 135,040.77 × 63,815.58
  4. Step 4: Simplify right side
    90,059.58x = 8,617,705,061.20
  5. Step 5: Solve for x
    x = 8,617,705,061.20/90,059.58
  6. Step 6: Final answer
    x = 95,688.93

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1.5x scale

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.