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Finding the Fourth Proportional to 6,616,393.60, 9,925,972.80 and 2,129,123.20

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Solution

The fourth proportional to 6,616,393.60, 9,925,972.80 and 2,129,123.20 is: 3,194,129.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,616,393.60 : 9,925,972.80 = 2,129,123.20 : x
  2. Step 2: Convert to fraction form
    6,616,393.60/9,925,972.80 = 2,129,123.20/x
  3. Step 3: Cross multiply
    6,616,393.60x = 9,925,972.80 × 2,129,123.20
  4. Step 4: Simplify right side
    6,616,393.60x = 21,133,618,971,048.96
  5. Step 5: Solve for x
    x = 21,133,618,971,048.96/6,616,393.60
  6. Step 6: Final answer
    x = 3,194,129.65

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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.