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Finding the Fourth Proportional to 81,157.98, 111,990.02 and 45,347.21

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Solution

The fourth proportional to 81,157.98, 111,990.02 and 45,347.21 is: 62,574.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,157.98 : 111,990.02 = 45,347.21 : x
  2. Step 2: Convert to fraction form
    81,157.98/111,990.02 = 45,347.21/x
  3. Step 3: Cross multiply
    81,157.98x = 111,990.02 × 45,347.21
  4. Step 4: Simplify right side
    81,157.98x = 5,078,434,168.16
  5. Step 5: Solve for x
    x = 5,078,434,168.16/81,157.98
  6. Step 6: Final answer
    x = 62,574.67

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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.