Home / 209,017.50-288,455.10-122,980.92

Finding the Fourth Proportional to 209,017.50, 288,455.10 and 122,980.92

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Solution

The fourth proportional to 209,017.50, 288,455.10 and 122,980.92 is: 169,720.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,017.50 : 288,455.10 = 122,980.92 : x
  2. Step 2: Convert to fraction form
    209,017.50/288,455.10 = 122,980.92/x
  3. Step 3: Cross multiply
    209,017.50x = 288,455.10 × 122,980.92
  4. Step 4: Simplify right side
    209,017.50x = 35,474,473,576.69
  5. Step 5: Solve for x
    x = 35,474,473,576.69/209,017.50
  6. Step 6: Final answer
    x = 169,720.11

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1.5x scale

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.