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Finding the Fourth Proportional to 220,442.88, 330,688.64 and 70,647.68

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Solution

The fourth proportional to 220,442.88, 330,688.64 and 70,647.68 is: 105,979.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,442.88 : 330,688.64 = 70,647.68 : x
  2. Step 2: Convert to fraction form
    220,442.88/330,688.64 = 70,647.68/x
  3. Step 3: Cross multiply
    220,442.88x = 330,688.64 × 70,647.68
  4. Step 4: Simplify right side
    220,442.88x = 23,362,385,218.36
  5. Step 5: Solve for x
    x = 23,362,385,218.36/220,442.88
  6. Step 6: Final answer
    x = 105,979.31

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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.