Home / 139,515.04-207,958.28-128,317.60

Finding the Fourth Proportional to 139,515.04, 207,958.28 and 128,317.60

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Solution

The fourth proportional to 139,515.04, 207,958.28 and 128,317.60 is: 191,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,515.04 : 207,958.28 = 128,317.60 : x
  2. Step 2: Convert to fraction form
    139,515.04/207,958.28 = 128,317.60/x
  3. Step 3: Cross multiply
    139,515.04x = 207,958.28 × 128,317.60
  4. Step 4: Simplify right side
    139,515.04x = 26,684,707,389.73
  5. Step 5: Solve for x
    x = 26,684,707,389.73/139,515.04
  6. Step 6: Final answer
    x = 191,267.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.