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Finding the Fourth Proportional to 281,113.66, 421,726.92 and 103,621.60

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Solution

The fourth proportional to 281,113.66, 421,726.92 and 103,621.60 is: 155,453.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,113.66 : 421,726.92 = 103,621.60 : x
  2. Step 2: Convert to fraction form
    281,113.66/421,726.92 = 103,621.60/x
  3. Step 3: Cross multiply
    281,113.66x = 421,726.92 × 103,621.60
  4. Step 4: Simplify right side
    281,113.66x = 43,700,018,213.47
  5. Step 5: Solve for x
    x = 43,700,018,213.47/281,113.66
  6. Step 6: Final answer
    x = 155,453.20

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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.