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Finding the Fourth Proportional to 40,683.60, 61,039.80 and 39,243.60

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Solution

The fourth proportional to 40,683.60, 61,039.80 and 39,243.60 is: 58,879.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,683.60 : 61,039.80 = 39,243.60 : x
  2. Step 2: Convert to fraction form
    40,683.60/61,039.80 = 39,243.60/x
  3. Step 3: Cross multiply
    40,683.60x = 61,039.80 × 39,243.60
  4. Step 4: Simplify right side
    40,683.60x = 2,395,421,495.28
  5. Step 5: Solve for x
    x = 2,395,421,495.28/40,683.60
  6. Step 6: Final answer
    x = 58,879.29

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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.