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Finding the Fourth Proportional to 91,891.80, 126,810.18 and 51,607.26

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Solution

The fourth proportional to 91,891.80, 126,810.18 and 51,607.26 is: 71,217.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,891.80 : 126,810.18 = 51,607.26 : x
  2. Step 2: Convert to fraction form
    91,891.80/126,810.18 = 51,607.26/x
  3. Step 3: Cross multiply
    91,891.80x = 126,810.18 × 51,607.26
  4. Step 4: Simplify right side
    91,891.80x = 6,544,325,929.91
  5. Step 5: Solve for x
    x = 6,544,325,929.91/91,891.80
  6. Step 6: Final answer
    x = 71,217.74

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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.