Home / 91,977.90-126,930-53,739.69

Finding the Fourth Proportional to 91,977.90, 126,930 and 53,739.69

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Solution

The fourth proportional to 91,977.90, 126,930 and 53,739.69 is: 74,161.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,977.90 : 126,930 = 53,739.69 : x
  2. Step 2: Convert to fraction form
    91,977.90/126,930 = 53,739.69/x
  3. Step 3: Cross multiply
    91,977.90x = 126,930 × 53,739.69
  4. Step 4: Simplify right side
    91,977.90x = 6,821,178,851.70
  5. Step 5: Solve for x
    x = 6,821,178,851.70/91,977.90
  6. Step 6: Final answer
    x = 74,161.06

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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.