Home / 139,206.47-192,109.19-81,835.25

Finding the Fourth Proportional to 139,206.47, 192,109.19 and 81,835.25

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Solution

The fourth proportional to 139,206.47, 192,109.19 and 81,835.25 is: 112,935.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,206.47 : 192,109.19 = 81,835.25 : x
  2. Step 2: Convert to fraction form
    139,206.47/192,109.19 = 81,835.25/x
  3. Step 3: Cross multiply
    139,206.47x = 192,109.19 × 81,835.25
  4. Step 4: Simplify right side
    139,206.47x = 15,721,302,221.23
  5. Step 5: Solve for x
    x = 15,721,302,221.23/139,206.47
  6. Step 6: Final answer
    x = 112,935.14

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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.