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Finding the Fourth Proportional to 218,814.30, 328,216.65 and 61,038.30

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Solution

The fourth proportional to 218,814.30, 328,216.65 and 61,038.30 is: 91,556.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,814.30 : 328,216.65 = 61,038.30 : x
  2. Step 2: Convert to fraction form
    218,814.30/328,216.65 = 61,038.30/x
  3. Step 3: Cross multiply
    218,814.30x = 328,216.65 × 61,038.30
  4. Step 4: Simplify right side
    218,814.30x = 20,033,786,347.70
  5. Step 5: Solve for x
    x = 20,033,786,347.70/218,814.30
  6. Step 6: Final answer
    x = 91,556.11

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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.