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Finding the Fourth Proportional to 103,638.25, 155,457.42 and 37,074.40

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Solution

The fourth proportional to 103,638.25, 155,457.42 and 37,074.40 is: 55,611.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.25 : 155,457.42 = 37,074.40 : x
  2. Step 2: Convert to fraction form
    103,638.25/155,457.42 = 37,074.40/x
  3. Step 3: Cross multiply
    103,638.25x = 155,457.42 × 37,074.40
  4. Step 4: Simplify right side
    103,638.25x = 5,763,490,572.05
  5. Step 5: Solve for x
    x = 5,763,490,572.05/103,638.25
  6. Step 6: Final answer
    x = 55,611.62

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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.