Home / 78,143.12-107,768.04-61,346.96

Finding the Fourth Proportional to 78,143.12, 107,768.04 and 61,346.96

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Solution

The fourth proportional to 78,143.12, 107,768.04 and 61,346.96 is: 84,604.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,143.12 : 107,768.04 = 61,346.96 : x
  2. Step 2: Convert to fraction form
    78,143.12/107,768.04 = 61,346.96/x
  3. Step 3: Cross multiply
    78,143.12x = 107,768.04 × 61,346.96
  4. Step 4: Simplify right side
    78,143.12x = 6,611,241,639.16
  5. Step 5: Solve for x
    x = 6,611,241,639.16/78,143.12
  6. Step 6: Final answer
    x = 84,604.27

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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.