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Finding the Fourth Proportional to 103,676.90, 155,515.35 and 70,499.30

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Solution

The fourth proportional to 103,676.90, 155,515.35 and 70,499.30 is: 105,748.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,676.90 : 155,515.35 = 70,499.30 : x
  2. Step 2: Convert to fraction form
    103,676.90/155,515.35 = 70,499.30/x
  3. Step 3: Cross multiply
    103,676.90x = 155,515.35 × 70,499.30
  4. Step 4: Simplify right side
    103,676.90x = 10,963,723,314.26
  5. Step 5: Solve for x
    x = 10,963,723,314.26/103,676.90
  6. Step 6: Final answer
    x = 105,748.95

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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.