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Finding the Fourth Proportional to 420,632.70, 630,948.93 and 125,144.70

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Solution

The fourth proportional to 420,632.70, 630,948.93 and 125,144.70 is: 187,717.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,632.70 : 630,948.93 = 125,144.70 : x
  2. Step 2: Convert to fraction form
    420,632.70/630,948.93 = 125,144.70/x
  3. Step 3: Cross multiply
    420,632.70x = 630,948.93 × 125,144.70
  4. Step 4: Simplify right side
    420,632.70x = 78,959,914,560.17
  5. Step 5: Solve for x
    x = 78,959,914,560.17/420,632.70
  6. Step 6: Final answer
    x = 187,717.01

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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.