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Finding the Fourth Proportional to 103,643.40, 155,388.30 and 44,430.60

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Solution

The fourth proportional to 103,643.40, 155,388.30 and 44,430.60 is: 66,612.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,643.40 : 155,388.30 = 44,430.60 : x
  2. Step 2: Convert to fraction form
    103,643.40/155,388.30 = 44,430.60/x
  3. Step 3: Cross multiply
    103,643.40x = 155,388.30 × 44,430.60
  4. Step 4: Simplify right side
    103,643.40x = 6,903,995,401.98
  5. Step 5: Solve for x
    x = 6,903,995,401.98/103,643.40
  6. Step 6: Final answer
    x = 66,612.98

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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.