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Finding the Fourth Proportional to 78,880,270.80, 118,096,457.40 and 78,880,270.80

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Solution

The fourth proportional to 78,880,270.80, 118,096,457.40 and 78,880,270.80 is: 118,096,457.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880,270.80 : 118,096,457.40 = 78,880,270.80 : x
  2. Step 2: Convert to fraction form
    78,880,270.80/118,096,457.40 = 78,880,270.80/x
  3. Step 3: Cross multiply
    78,880,270.80x = 118,096,457.40 × 78,880,270.80
  4. Step 4: Simplify right side
    78,880,270.80x = 9,315,480,540,232,664
  5. Step 5: Solve for x
    x = 9,315,480,540,232,664/78,880,270.80
  6. Step 6: Final answer
    x = 118,096,457.40

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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.