Home / 137,511.72-189,777.78-77,081.40

Finding the Fourth Proportional to 137,511.72, 189,777.78 and 77,081.40

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Solution

The fourth proportional to 137,511.72, 189,777.78 and 77,081.40 is: 106,378.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,511.72 : 189,777.78 = 77,081.40 : x
  2. Step 2: Convert to fraction form
    137,511.72/189,777.78 = 77,081.40/x
  3. Step 3: Cross multiply
    137,511.72x = 189,777.78 × 77,081.40
  4. Step 4: Simplify right side
    137,511.72x = 14,628,336,971.29
  5. Step 5: Solve for x
    x = 14,628,336,971.29/137,511.72
  6. Step 6: Final answer
    x = 106,378.84

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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.