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Finding the Fourth Proportional to 147,264.80, 221,012.40 and 68,388.80

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Solution

The fourth proportional to 147,264.80, 221,012.40 and 68,388.80 is: 102,636.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,264.80 : 221,012.40 = 68,388.80 : x
  2. Step 2: Convert to fraction form
    147,264.80/221,012.40 = 68,388.80/x
  3. Step 3: Cross multiply
    147,264.80x = 221,012.40 × 68,388.80
  4. Step 4: Simplify right side
    147,264.80x = 15,114,772,821.12
  5. Step 5: Solve for x
    x = 15,114,772,821.12/147,264.80
  6. Step 6: Final answer
    x = 102,636.70

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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.