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Finding the Fourth Proportional to 139,995.79, 191,648.57 and 138,995.23

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Solution

The fourth proportional to 139,995.79, 191,648.57 and 138,995.23 is: 190,278.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,995.79 : 191,648.57 = 138,995.23 : x
  2. Step 2: Convert to fraction form
    139,995.79/191,648.57 = 138,995.23/x
  3. Step 3: Cross multiply
    139,995.79x = 191,648.57 × 138,995.23
  4. Step 4: Simplify right side
    139,995.79x = 26,638,237,066.32
  5. Step 5: Solve for x
    x = 26,638,237,066.32/139,995.79
  6. Step 6: Final answer
    x = 190,278.84

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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.