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Finding the Fourth Proportional to 133,315.20, 199,995.20 and 39,830.40

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Solution

The fourth proportional to 133,315.20, 199,995.20 and 39,830.40 is: 59,752.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,315.20 : 199,995.20 = 39,830.40 : x
  2. Step 2: Convert to fraction form
    133,315.20/199,995.20 = 39,830.40/x
  3. Step 3: Cross multiply
    133,315.20x = 199,995.20 × 39,830.40
  4. Step 4: Simplify right side
    133,315.20x = 7,965,888,814.08
  5. Step 5: Solve for x
    x = 7,965,888,814.08/133,315.20
  6. Step 6: Final answer
    x = 59,752.29

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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.