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Finding the Fourth Proportional to 78,846.10, 108,808.18 and 43,036.40

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Solution

The fourth proportional to 78,846.10, 108,808.18 and 43,036.40 is: 59,390.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,846.10 : 108,808.18 = 43,036.40 : x
  2. Step 2: Convert to fraction form
    78,846.10/108,808.18 = 43,036.40/x
  3. Step 3: Cross multiply
    78,846.10x = 108,808.18 × 43,036.40
  4. Step 4: Simplify right side
    78,846.10x = 4,682,712,357.75
  5. Step 5: Solve for x
    x = 4,682,712,357.75/78,846.10
  6. Step 6: Final answer
    x = 59,390.54

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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.