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Finding the Fourth Proportional to 138,995.58, 191,812.56 and 77,741.10

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Solution

The fourth proportional to 138,995.58, 191,812.56 and 77,741.10 is: 107,281.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,995.58 : 191,812.56 = 77,741.10 : x
  2. Step 2: Convert to fraction form
    138,995.58/191,812.56 = 77,741.10/x
  3. Step 3: Cross multiply
    138,995.58x = 191,812.56 × 77,741.10
  4. Step 4: Simplify right side
    138,995.58x = 14,911,719,408.22
  5. Step 5: Solve for x
    x = 14,911,719,408.22/138,995.58
  6. Step 6: Final answer
    x = 107,281.97

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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.