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Finding the Fourth Proportional to 420,181.84, 630,176.76 and 120,660.04

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Solution

The fourth proportional to 420,181.84, 630,176.76 and 120,660.04 is: 180,962.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,181.84 : 630,176.76 = 120,660.04 : x
  2. Step 2: Convert to fraction form
    420,181.84/630,176.76 = 120,660.04/x
  3. Step 3: Cross multiply
    420,181.84x = 630,176.76 × 120,660.04
  4. Step 4: Simplify right side
    420,181.84x = 76,037,153,068.67
  5. Step 5: Solve for x
    x = 76,037,153,068.67/420,181.84
  6. Step 6: Final answer
    x = 180,962.49

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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.