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Finding the Fourth Proportional to 103,489.40, 155,234.10 and 70,225.40

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Solution

The fourth proportional to 103,489.40, 155,234.10 and 70,225.40 is: 105,338.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,489.40 : 155,234.10 = 70,225.40 : x
  2. Step 2: Convert to fraction form
    103,489.40/155,234.10 = 70,225.40/x
  3. Step 3: Cross multiply
    103,489.40x = 155,234.10 × 70,225.40
  4. Step 4: Simplify right side
    103,489.40x = 10,901,376,766.14
  5. Step 5: Solve for x
    x = 10,901,376,766.14/103,489.40
  6. Step 6: Final answer
    x = 105,338.10

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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.