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Finding the Fourth Proportional to 145,091.80, 217,674.42 and 70,247.80

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Solution

The fourth proportional to 145,091.80, 217,674.42 and 70,247.80 is: 105,389.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,091.80 : 217,674.42 = 70,247.80 : x
  2. Step 2: Convert to fraction form
    145,091.80/217,674.42 = 70,247.80/x
  3. Step 3: Cross multiply
    145,091.80x = 217,674.42 × 70,247.80
  4. Step 4: Simplify right side
    145,091.80x = 15,291,149,121.28
  5. Step 5: Solve for x
    x = 15,291,149,121.28/145,091.80
  6. Step 6: Final answer
    x = 105,389.48

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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.