Home / 45,128.12-67,706.02-20,189.16

Finding the Fourth Proportional to 45,128.12, 67,706.02 and 20,189.16

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Solution

The fourth proportional to 45,128.12, 67,706.02 and 20,189.16 is: 30,289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,128.12 : 67,706.02 = 20,189.16 : x
  2. Step 2: Convert to fraction form
    45,128.12/67,706.02 = 20,189.16/x
  3. Step 3: Cross multiply
    45,128.12x = 67,706.02 × 20,189.16
  4. Step 4: Simplify right side
    45,128.12x = 1,366,927,670.74
  5. Step 5: Solve for x
    x = 1,366,927,670.74/45,128.12
  6. Step 6: Final answer
    x = 30,289.93

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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.