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Finding the Fourth Proportional to 219,957.80, 329,792.70 and 86,757.80

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Solution

The fourth proportional to 219,957.80, 329,792.70 and 86,757.80 is: 130,079.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,957.80 : 329,792.70 = 86,757.80 : x
  2. Step 2: Convert to fraction form
    219,957.80/329,792.70 = 86,757.80/x
  3. Step 3: Cross multiply
    219,957.80x = 329,792.70 × 86,757.80
  4. Step 4: Simplify right side
    219,957.80x = 28,612,089,108.06
  5. Step 5: Solve for x
    x = 28,612,089,108.06/219,957.80
  6. Step 6: Final answer
    x = 130,079.90

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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.