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Finding the Fourth Proportional to 219,989.40, 329,984.10 and 53,777.40

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Solution

The fourth proportional to 219,989.40, 329,984.10 and 53,777.40 is: 80,666.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,989.40 : 329,984.10 = 53,777.40 : x
  2. Step 2: Convert to fraction form
    219,989.40/329,984.10 = 53,777.40/x
  3. Step 3: Cross multiply
    219,989.40x = 329,984.10 × 53,777.40
  4. Step 4: Simplify right side
    219,989.40x = 17,745,686,939.34
  5. Step 5: Solve for x
    x = 17,745,686,939.34/219,989.40
  6. Step 6: Final answer
    x = 80,666.10

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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.