Home / 139,622.40-209,433.60-39,772.80

Finding the Fourth Proportional to 139,622.40, 209,433.60 and 39,772.80

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Solution

The fourth proportional to 139,622.40, 209,433.60 and 39,772.80 is: 59,659.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,622.40 : 209,433.60 = 39,772.80 : x
  2. Step 2: Convert to fraction form
    139,622.40/209,433.60 = 39,772.80/x
  3. Step 3: Cross multiply
    139,622.40x = 209,433.60 × 39,772.80
  4. Step 4: Simplify right side
    139,622.40x = 8,329,760,686.08
  5. Step 5: Solve for x
    x = 8,329,760,686.08/139,622.40
  6. Step 6: Final answer
    x = 59,659.20

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1.5x scale

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.