Home / 138,558.61-191,194.63-78,125.65

Finding the Fourth Proportional to 138,558.61, 191,194.63 and 78,125.65

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Solution

The fourth proportional to 138,558.61, 191,194.63 and 78,125.65 is: 107,804.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,558.61 : 191,194.63 = 78,125.65 : x
  2. Step 2: Convert to fraction form
    138,558.61/191,194.63 = 78,125.65/x
  3. Step 3: Cross multiply
    138,558.61x = 191,194.63 × 78,125.65
  4. Step 4: Simplify right side
    138,558.61x = 14,937,204,071.96
  5. Step 5: Solve for x
    x = 14,937,204,071.96/138,558.61
  6. Step 6: Final answer
    x = 107,804.23

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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.