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Finding the Fourth Proportional to 280,113.03, 420,224.19 and 90,620.37

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Solution

The fourth proportional to 280,113.03, 420,224.19 and 90,620.37 is: 135,948.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,113.03 : 420,224.19 = 90,620.37 : x
  2. Step 2: Convert to fraction form
    280,113.03/420,224.19 = 90,620.37/x
  3. Step 3: Cross multiply
    280,113.03x = 420,224.19 × 90,620.37
  4. Step 4: Simplify right side
    280,113.03x = 38,080,871,580.75
  5. Step 5: Solve for x
    x = 38,080,871,580.75/280,113.03
  6. Step 6: Final answer
    x = 135,948.23

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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.