Home / 289,845.15-434,749.50-90,150.18

Finding the Fourth Proportional to 289,845.15, 434,749.50 and 90,150.18

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Solution

The fourth proportional to 289,845.15, 434,749.50 and 90,150.18 is: 135,219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,845.15 : 434,749.50 = 90,150.18 : x
  2. Step 2: Convert to fraction form
    289,845.15/434,749.50 = 90,150.18/x
  3. Step 3: Cross multiply
    289,845.15x = 434,749.50 × 90,150.18
  4. Step 4: Simplify right side
    289,845.15x = 39,192,745,679.91
  5. Step 5: Solve for x
    x = 39,192,745,679.91/289,845.15
  6. Step 6: Final answer
    x = 135,219.60

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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.