Home / 78,020.70-107,668.58-42,210.69

Finding the Fourth Proportional to 78,020.70, 107,668.58 and 42,210.69

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Solution

The fourth proportional to 78,020.70, 107,668.58 and 42,210.69 is: 58,250.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,020.70 : 107,668.58 = 42,210.69 : x
  2. Step 2: Convert to fraction form
    78,020.70/107,668.58 = 42,210.69/x
  3. Step 3: Cross multiply
    78,020.70x = 107,668.58 × 42,210.69
  4. Step 4: Simplify right side
    78,020.70x = 4,544,764,842.07
  5. Step 5: Solve for x
    x = 4,544,764,842.07/78,020.70
  6. Step 6: Final answer
    x = 58,250.76

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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.