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Finding the Fourth Proportional to 203,225.60, 305,011.20 and 91,078.40

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Solution

The fourth proportional to 203,225.60, 305,011.20 and 91,078.40 is: 136,695.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,225.60 : 305,011.20 = 91,078.40 : x
  2. Step 2: Convert to fraction form
    203,225.60/305,011.20 = 91,078.40/x
  3. Step 3: Cross multiply
    203,225.60x = 305,011.20 × 91,078.40
  4. Step 4: Simplify right side
    203,225.60x = 27,779,932,078.08
  5. Step 5: Solve for x
    x = 27,779,932,078.08/203,225.60
  6. Step 6: Final answer
    x = 136,695.04

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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.