Home / 138,741.96-191,463.84-78,325.14

Finding the Fourth Proportional to 138,741.96, 191,463.84 and 78,325.14

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Solution

The fourth proportional to 138,741.96, 191,463.84 and 78,325.14 is: 108,088.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,741.96 : 191,463.84 = 78,325.14 : x
  2. Step 2: Convert to fraction form
    138,741.96/191,463.84 = 78,325.14/x
  3. Step 3: Cross multiply
    138,741.96x = 191,463.84 × 78,325.14
  4. Step 4: Simplify right side
    138,741.96x = 14,996,432,072.94
  5. Step 5: Solve for x
    x = 14,996,432,072.94/138,741.96
  6. Step 6: Final answer
    x = 108,088.66

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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.