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Finding the Fourth Proportional to 420,087.20, 630,129.48 and 104,544.32

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Solution

The fourth proportional to 420,087.20, 630,129.48 and 104,544.32 is: 156,816.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,087.20 : 630,129.48 = 104,544.32 : x
  2. Step 2: Convert to fraction form
    420,087.20/630,129.48 = 104,544.32/x
  3. Step 3: Cross multiply
    420,087.20x = 630,129.48 × 104,544.32
  4. Step 4: Simplify right side
    420,087.20x = 65,876,457,998.55
  5. Step 5: Solve for x
    x = 65,876,457,998.55/420,087.20
  6. Step 6: Final answer
    x = 156,816.15

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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.