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Finding the Fourth Proportional to 219,889.60, 329,834.40 and 70,128.70

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Solution

The fourth proportional to 219,889.60, 329,834.40 and 70,128.70 is: 105,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,889.60 : 329,834.40 = 70,128.70 : x
  2. Step 2: Convert to fraction form
    219,889.60/329,834.40 = 70,128.70/x
  3. Step 3: Cross multiply
    219,889.60x = 329,834.40 × 70,128.70
  4. Step 4: Simplify right side
    219,889.60x = 23,130,857,687.28
  5. Step 5: Solve for x
    x = 23,130,857,687.28/219,889.60
  6. Step 6: Final answer
    x = 105,193.05

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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.