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Finding the Fourth Proportional to 212,539.71, 318,798.57 and 79,409.46

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Solution

The fourth proportional to 212,539.71, 318,798.57 and 79,409.46 is: 119,110.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,539.71 : 318,798.57 = 79,409.46 : x
  2. Step 2: Convert to fraction form
    212,539.71/318,798.57 = 79,409.46/x
  3. Step 3: Cross multiply
    212,539.71x = 318,798.57 × 79,409.46
  4. Step 4: Simplify right side
    212,539.71x = 25,315,622,292.47
  5. Step 5: Solve for x
    x = 25,315,622,292.47/212,539.71
  6. Step 6: Final answer
    x = 119,110.08

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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.