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Finding the Fourth Proportional to 147,612.80, 221,451.60 and 72,768.80

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Solution

The fourth proportional to 147,612.80, 221,451.60 and 72,768.80 is: 109,169.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,612.80 : 221,451.60 = 72,768.80 : x
  2. Step 2: Convert to fraction form
    147,612.80/221,451.60 = 72,768.80/x
  3. Step 3: Cross multiply
    147,612.80x = 221,451.60 × 72,768.80
  4. Step 4: Simplify right side
    147,612.80x = 16,114,767,190.08
  5. Step 5: Solve for x
    x = 16,114,767,190.08/147,612.80
  6. Step 6: Final answer
    x = 109,169.17

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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.