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Finding the Fourth Proportional to 251,259, 377,061.30 and 103,515

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Solution

The fourth proportional to 251,259, 377,061.30 and 103,515 is: 155,343.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,259 : 377,061.30 = 103,515 : x
  2. Step 2: Convert to fraction form
    251,259/377,061.30 = 103,515/x
  3. Step 3: Cross multiply
    251,259x = 377,061.30 × 103,515
  4. Step 4: Simplify right side
    251,259x = 39,031,500,469.50
  5. Step 5: Solve for x
    x = 39,031,500,469.50/251,259
  6. Step 6: Final answer
    x = 155,343.69

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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.