Home / 420,021.18-630,034.06-104,478.10

Finding the Fourth Proportional to 420,021.18, 630,034.06 and 104,478.10

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Solution

The fourth proportional to 420,021.18, 630,034.06 and 104,478.10 is: 156,717.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,021.18 : 630,034.06 = 104,478.10 : x
  2. Step 2: Convert to fraction form
    420,021.18/630,034.06 = 104,478.10/x
  3. Step 3: Cross multiply
    420,021.18x = 630,034.06 × 104,478.10
  4. Step 4: Simplify right side
    420,021.18x = 65,824,761,524.09
  5. Step 5: Solve for x
    x = 65,824,761,524.09/420,021.18
  6. Step 6: Final answer
    x = 156,717.72

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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.