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Finding the Fourth Proportional to 90,630, 135,973.89 and 38,025.36

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Solution

The fourth proportional to 90,630, 135,973.89 and 38,025.36 is: 57,050.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,630 : 135,973.89 = 38,025.36 : x
  2. Step 2: Convert to fraction form
    90,630/135,973.89 = 38,025.36/x
  3. Step 3: Cross multiply
    90,630x = 135,973.89 × 38,025.36
  4. Step 4: Simplify right side
    90,630x = 5,170,456,117.85
  5. Step 5: Solve for x
    x = 5,170,456,117.85/90,630
  6. Step 6: Final answer
    x = 57,050.16

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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.