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Finding the Fourth Proportional to 103,697.80, 155,388.21 and 69,838.60

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Solution

The fourth proportional to 103,697.80, 155,388.21 and 69,838.60 is: 104,651.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,697.80 : 155,388.21 = 69,838.60 : x
  2. Step 2: Convert to fraction form
    103,697.80/155,388.21 = 69,838.60/x
  3. Step 3: Cross multiply
    103,697.80x = 155,388.21 × 69,838.60
  4. Step 4: Simplify right side
    103,697.80x = 10,852,095,042.91
  5. Step 5: Solve for x
    x = 10,852,095,042.91/103,697.80
  6. Step 6: Final answer
    x = 104,651.16

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1.5x scale

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.