Home / 90,487.13-135,730.69-28,157.63

Finding the Fourth Proportional to 90,487.13, 135,730.69 and 28,157.63

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Solution

The fourth proportional to 90,487.13, 135,730.69 and 28,157.63 is: 42,236.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,487.13 : 135,730.69 = 28,157.63 : x
  2. Step 2: Convert to fraction form
    90,487.13/135,730.69 = 28,157.63/x
  3. Step 3: Cross multiply
    90,487.13x = 135,730.69 × 28,157.63
  4. Step 4: Simplify right side
    90,487.13x = 3,821,853,799.62
  5. Step 5: Solve for x
    x = 3,821,853,799.62/90,487.13
  6. Step 6: Final answer
    x = 42,236.44

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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.