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Finding the Fourth Proportional to 70,513.20, 105,774.60 and 20,593.20

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Solution

The fourth proportional to 70,513.20, 105,774.60 and 20,593.20 is: 30,891.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,513.20 : 105,774.60 = 20,593.20 : x
  2. Step 2: Convert to fraction form
    70,513.20/105,774.60 = 20,593.20/x
  3. Step 3: Cross multiply
    70,513.20x = 105,774.60 × 20,593.20
  4. Step 4: Simplify right side
    70,513.20x = 2,178,237,492.72
  5. Step 5: Solve for x
    x = 2,178,237,492.72/70,513.20
  6. Step 6: Final answer
    x = 30,891.20

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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.