Home / 421,143.20-631,668.30-105,600.08

Finding the Fourth Proportional to 421,143.20, 631,668.30 and 105,600.08

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Solution

The fourth proportional to 421,143.20, 631,668.30 and 105,600.08 is: 158,388.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,143.20 : 631,668.30 = 105,600.08 : x
  2. Step 2: Convert to fraction form
    421,143.20/631,668.30 = 105,600.08/x
  3. Step 3: Cross multiply
    421,143.20x = 631,668.30 × 105,600.08
  4. Step 4: Simplify right side
    421,143.20x = 66,704,223,013.46
  5. Step 5: Solve for x
    x = 66,704,223,013.46/421,143.20
  6. Step 6: Final answer
    x = 158,388.46

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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.