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Finding the Fourth Proportional to 103,617.80, 155,349.90 and 70,254.60

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Solution

The fourth proportional to 103,617.80, 155,349.90 and 70,254.60 is: 105,329.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,617.80 : 155,349.90 = 70,254.60 : x
  2. Step 2: Convert to fraction form
    103,617.80/155,349.90 = 70,254.60/x
  3. Step 3: Cross multiply
    103,617.80x = 155,349.90 × 70,254.60
  4. Step 4: Simplify right side
    103,617.80x = 10,914,045,084.54
  5. Step 5: Solve for x
    x = 10,914,045,084.54/103,617.80
  6. Step 6: Final answer
    x = 105,329.83

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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.