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Finding the Fourth Proportional to 30,172.55, 45,219.78 and 16,845.20

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Solution

The fourth proportional to 30,172.55, 45,219.78 and 16,845.20 is: 25,246.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,172.55 : 45,219.78 = 16,845.20 : x
  2. Step 2: Convert to fraction form
    30,172.55/45,219.78 = 16,845.20/x
  3. Step 3: Cross multiply
    30,172.55x = 45,219.78 × 16,845.20
  4. Step 4: Simplify right side
    30,172.55x = 761,736,238.06
  5. Step 5: Solve for x
    x = 761,736,238.06/30,172.55
  6. Step 6: Final answer
    x = 25,246.00

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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.