Home / 78,500.63-108,330.33-42,690.54

Finding the Fourth Proportional to 78,500.63, 108,330.33 and 42,690.54

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Solution

The fourth proportional to 78,500.63, 108,330.33 and 42,690.54 is: 58,912.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500.63 : 108,330.33 = 42,690.54 : x
  2. Step 2: Convert to fraction form
    78,500.63/108,330.33 = 42,690.54/x
  3. Step 3: Cross multiply
    78,500.63x = 108,330.33 × 42,690.54
  4. Step 4: Simplify right side
    78,500.63x = 4,624,680,286.08
  5. Step 5: Solve for x
    x = 4,624,680,286.08/78,500.63
  6. Step 6: Final answer
    x = 58,912.66

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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.