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Finding the Fourth Proportional to 219,805,817.60, 329,872,540.80 and 83,756,921.60

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Solution

The fourth proportional to 219,805,817.60, 329,872,540.80 and 83,756,921.60 is: 125,697,803.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,805,817.60 : 329,872,540.80 = 83,756,921.60 : x
  2. Step 2: Convert to fraction form
    219,805,817.60/329,872,540.80 = 83,756,921.60/x
  3. Step 3: Cross multiply
    219,805,817.60x = 329,872,540.80 × 83,756,921.60
  4. Step 4: Simplify right side
    219,805,817.60x = 27,629,108,537,778,400
  5. Step 5: Solve for x
    x = 27,629,108,537,778,400/219,805,817.60
  6. Step 6: Final answer
    x = 125,697,803.81

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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.