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Finding the Fourth Proportional to 39,861,638.40, 59,792,457.60 and 39,105,811.20

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Solution

The fourth proportional to 39,861,638.40, 59,792,457.60 and 39,105,811.20 is: 58,658,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861,638.40 : 59,792,457.60 = 39,105,811.20 : x
  2. Step 2: Convert to fraction form
    39,861,638.40/59,792,457.60 = 39,105,811.20/x
  3. Step 3: Cross multiply
    39,861,638.40x = 59,792,457.60 × 39,105,811.20
  4. Step 4: Simplify right side
    39,861,638.40x = 2,338,232,558,089,605.50
  5. Step 5: Solve for x
    x = 2,338,232,558,089,605.50/39,861,638.40
  6. Step 6: Final answer
    x = 58,658,716.80

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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.