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Finding the Fourth Proportional to 219,940.80, 329,767.20 and 86,740.80

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Solution

The fourth proportional to 219,940.80, 329,767.20 and 86,740.80 is: 130,054.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,940.80 : 329,767.20 = 86,740.80 : x
  2. Step 2: Convert to fraction form
    219,940.80/329,767.20 = 86,740.80/x
  3. Step 3: Cross multiply
    219,940.80x = 329,767.20 × 86,740.80
  4. Step 4: Simplify right side
    219,940.80x = 28,604,270,741.76
  5. Step 5: Solve for x
    x = 28,604,270,741.76/219,940.80
  6. Step 6: Final answer
    x = 130,054.41

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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.