Home / 209,621.20-289,272.71-122,421.30

Finding the Fourth Proportional to 209,621.20, 289,272.71 and 122,421.30

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Solution

The fourth proportional to 209,621.20, 289,272.71 and 122,421.30 is: 168,938.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,621.20 : 289,272.71 = 122,421.30 : x
  2. Step 2: Convert to fraction form
    209,621.20/289,272.71 = 122,421.30/x
  3. Step 3: Cross multiply
    209,621.20x = 289,272.71 × 122,421.30
  4. Step 4: Simplify right side
    209,621.20x = 35,413,142,603.55
  5. Step 5: Solve for x
    x = 35,413,142,603.55/209,621.20
  6. Step 6: Final answer
    x = 168,938.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.