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Finding the Fourth Proportional to 420,023.92, 630,038.15 and 104,480.86

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Solution

The fourth proportional to 420,023.92, 630,038.15 and 104,480.86 is: 156,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,023.92 : 630,038.15 = 104,480.86 : x
  2. Step 2: Convert to fraction form
    420,023.92/630,038.15 = 104,480.86/x
  3. Step 3: Cross multiply
    420,023.92x = 630,038.15 × 104,480.86
  4. Step 4: Simplify right side
    420,023.92x = 65,826,927,744.81
  5. Step 5: Solve for x
    x = 65,826,927,744.81/420,023.92
  6. Step 6: Final answer
    x = 156,721.85

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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.