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Finding the Fourth Proportional to 139,581.34, 209,280.13 and 92,051.51

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Solution

The fourth proportional to 139,581.34, 209,280.13 and 92,051.51 is: 138,016.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,581.34 : 209,280.13 = 92,051.51 : x
  2. Step 2: Convert to fraction form
    139,581.34/209,280.13 = 92,051.51/x
  3. Step 3: Cross multiply
    139,581.34x = 209,280.13 × 92,051.51
  4. Step 4: Simplify right side
    139,581.34x = 19,264,550,472.84
  5. Step 5: Solve for x
    x = 19,264,550,472.84/139,581.34
  6. Step 6: Final answer
    x = 138,016.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.