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Finding the Fourth Proportional to 103,615.10, 155,653.05 and 100,850.30

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Solution

The fourth proportional to 103,615.10, 155,653.05 and 100,850.30 is: 151,499.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,615.10 : 155,653.05 = 100,850.30 : x
  2. Step 2: Convert to fraction form
    103,615.10/155,653.05 = 100,850.30/x
  3. Step 3: Cross multiply
    103,615.10x = 155,653.05 × 100,850.30
  4. Step 4: Simplify right side
    103,615.10x = 15,697,656,788.42
  5. Step 5: Solve for x
    x = 15,697,656,788.42/103,615.10
  6. Step 6: Final answer
    x = 151,499.70

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1.5x scale

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.