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Finding the Fourth Proportional to 139,993.79, 191,645.83 and 138,993.23

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Solution

The fourth proportional to 139,993.79, 191,645.83 and 138,993.23 is: 190,276.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,993.79 : 191,645.83 = 138,993.23 : x
  2. Step 2: Convert to fraction form
    139,993.79/191,645.83 = 138,993.23/x
  3. Step 3: Cross multiply
    139,993.79x = 191,645.83 × 138,993.23
  4. Step 4: Simplify right side
    139,993.79x = 26,637,473,580.59
  5. Step 5: Solve for x
    x = 26,637,473,580.59/139,993.79
  6. Step 6: Final answer
    x = 190,276.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.