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Finding the Fourth Proportional to 78,899.70, 118,313.10 and 34,503.60

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Solution

The fourth proportional to 78,899.70, 118,313.10 and 34,503.60 is: 51,739.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,899.70 : 118,313.10 = 34,503.60 : x
  2. Step 2: Convert to fraction form
    78,899.70/118,313.10 = 34,503.60/x
  3. Step 3: Cross multiply
    78,899.70x = 118,313.10 × 34,503.60
  4. Step 4: Simplify right side
    78,899.70x = 4,082,227,877.16
  5. Step 5: Solve for x
    x = 4,082,227,877.16/78,899.70
  6. Step 6: Final answer
    x = 51,739.46

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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.