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Finding the Fourth Proportional to 90,090.40, 135,152.07 and 30,113.20

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Solution

The fourth proportional to 90,090.40, 135,152.07 and 30,113.20 is: 45,175.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,090.40 : 135,152.07 = 30,113.20 : x
  2. Step 2: Convert to fraction form
    90,090.40/135,152.07 = 30,113.20/x
  3. Step 3: Cross multiply
    90,090.40x = 135,152.07 × 30,113.20
  4. Step 4: Simplify right side
    90,090.40x = 4,069,861,314.32
  5. Step 5: Solve for x
    x = 4,069,861,314.32/90,090.40
  6. Step 6: Final answer
    x = 45,175.31

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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.