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Finding the Fourth Proportional to 78,998.46, 109,020.54 and 43,187.76

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Solution

The fourth proportional to 78,998.46, 109,020.54 and 43,187.76 is: 59,600.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,998.46 : 109,020.54 = 43,187.76 : x
  2. Step 2: Convert to fraction form
    78,998.46/109,020.54 = 43,187.76/x
  3. Step 3: Cross multiply
    78,998.46x = 109,020.54 × 43,187.76
  4. Step 4: Simplify right side
    78,998.46x = 4,708,352,916.59
  5. Step 5: Solve for x
    x = 4,708,352,916.59/78,998.46
  6. Step 6: Final answer
    x = 59,600.57

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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.