Home / 78,020.18-107,668.62-42,210.96

Finding the Fourth Proportional to 78,020.18, 107,668.62 and 42,210.96

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Solution

The fourth proportional to 78,020.18, 107,668.62 and 42,210.96 is: 58,251.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,020.18 : 107,668.62 = 42,210.96 : x
  2. Step 2: Convert to fraction form
    78,020.18/107,668.62 = 42,210.96/x
  3. Step 3: Cross multiply
    78,020.18x = 107,668.62 × 42,210.96
  4. Step 4: Simplify right side
    78,020.18x = 4,544,795,812.08
  5. Step 5: Solve for x
    x = 4,544,795,812.08/78,020.18
  6. Step 6: Final answer
    x = 58,251.54

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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.