Home / 90,455.16-135,688.50-30,478.75

Finding the Fourth Proportional to 90,455.16, 135,688.50 and 30,478.75

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Solution

The fourth proportional to 90,455.16, 135,688.50 and 30,478.75 is: 45,720.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,455.16 : 135,688.50 = 30,478.75 : x
  2. Step 2: Convert to fraction form
    90,455.16/135,688.50 = 30,478.75/x
  3. Step 3: Cross multiply
    90,455.16x = 135,688.50 × 30,478.75
  4. Step 4: Simplify right side
    90,455.16x = 4,135,615,530.15
  5. Step 5: Solve for x
    x = 4,135,615,530.15/90,455.16
  6. Step 6: Final answer
    x = 45,720.06

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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.