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Finding the Fourth Proportional to 84,235.99, 126,353.47 and 21,055.80

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Solution

The fourth proportional to 84,235.99, 126,353.47 and 21,055.80 is: 31,583.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,235.99 : 126,353.47 = 21,055.80 : x
  2. Step 2: Convert to fraction form
    84,235.99/126,353.47 = 21,055.80/x
  3. Step 3: Cross multiply
    84,235.99x = 126,353.47 × 21,055.80
  4. Step 4: Simplify right side
    84,235.99x = 2,660,473,393.63
  5. Step 5: Solve for x
    x = 2,660,473,393.63/84,235.99
  6. Step 6: Final answer
    x = 31,583.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.