Home / 219,048.10-328,658.55-85,905.70

Finding the Fourth Proportional to 219,048.10, 328,658.55 and 85,905.70

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Solution

The fourth proportional to 219,048.10, 328,658.55 and 85,905.70 is: 128,892.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,048.10 : 328,658.55 = 85,905.70 : x
  2. Step 2: Convert to fraction form
    219,048.10/328,658.55 = 85,905.70/x
  3. Step 3: Cross multiply
    219,048.10x = 328,658.55 × 85,905.70
  4. Step 4: Simplify right side
    219,048.10x = 28,233,642,798.74
  5. Step 5: Solve for x
    x = 28,233,642,798.74/219,048.10
  6. Step 6: Final answer
    x = 128,892.43

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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.