Home / 45,678.13-63,012.74-30,571.43

Finding the Fourth Proportional to 45,678.13, 63,012.74 and 30,571.43

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Solution

The fourth proportional to 45,678.13, 63,012.74 and 30,571.43 is: 42,173.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,678.13 : 63,012.74 = 30,571.43 : x
  2. Step 2: Convert to fraction form
    45,678.13/63,012.74 = 30,571.43/x
  3. Step 3: Cross multiply
    45,678.13x = 63,012.74 × 30,571.43
  4. Step 4: Simplify right side
    45,678.13x = 1,926,389,102.10
  5. Step 5: Solve for x
    x = 1,926,389,102.10/45,678.13
  6. Step 6: Final answer
    x = 42,173.12

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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.