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Finding the Fourth Proportional to 78,992.55, 109,009.74 and 43,182.54

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Solution

The fourth proportional to 78,992.55, 109,009.74 and 43,182.54 is: 59,591.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,992.55 : 109,009.74 = 43,182.54 : x
  2. Step 2: Convert to fraction form
    78,992.55/109,009.74 = 43,182.54/x
  3. Step 3: Cross multiply
    78,992.55x = 109,009.74 × 43,182.54
  4. Step 4: Simplify right side
    78,992.55x = 4,707,317,457.94
  5. Step 5: Solve for x
    x = 4,707,317,457.94/78,992.55
  6. Step 6: Final answer
    x = 59,591.92

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1.5x scale

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.