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Finding the Fourth Proportional to 190,628.80, 285,856.80 and 72,260.80

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Solution

The fourth proportional to 190,628.80, 285,856.80 and 72,260.80 is: 108,358.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,628.80 : 285,856.80 = 72,260.80 : x
  2. Step 2: Convert to fraction form
    190,628.80/285,856.80 = 72,260.80/x
  3. Step 3: Cross multiply
    190,628.80x = 285,856.80 × 72,260.80
  4. Step 4: Simplify right side
    190,628.80x = 20,656,241,053.44
  5. Step 5: Solve for x
    x = 20,656,241,053.44/190,628.80
  6. Step 6: Final answer
    x = 108,358.45

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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.