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Finding the Fourth Proportional to 103,343.90, 155,015.85 and 65,946.20

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Solution

The fourth proportional to 103,343.90, 155,015.85 and 65,946.20 is: 98,919.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,343.90 : 155,015.85 = 65,946.20 : x
  2. Step 2: Convert to fraction form
    103,343.90/155,015.85 = 65,946.20/x
  3. Step 3: Cross multiply
    103,343.90x = 155,015.85 × 65,946.20
  4. Step 4: Simplify right side
    103,343.90x = 10,222,706,247.27
  5. Step 5: Solve for x
    x = 10,222,706,247.27/103,343.90
  6. Step 6: Final answer
    x = 98,919.30

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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.