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Finding the Fourth Proportional to 216,573.80, 324,907.06 and 64,782.79

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Solution

The fourth proportional to 216,573.80, 324,907.06 and 64,782.79 is: 97,188.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,573.80 : 324,907.06 = 64,782.79 : x
  2. Step 2: Convert to fraction form
    216,573.80/324,907.06 = 64,782.79/x
  3. Step 3: Cross multiply
    216,573.80x = 324,907.06 × 64,782.79
  4. Step 4: Simplify right side
    216,573.80x = 21,048,385,513.58
  5. Step 5: Solve for x
    x = 21,048,385,513.58/216,573.80
  6. Step 6: Final answer
    x = 97,188.05

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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.