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Finding the Fourth Proportional to 97,988.40, 146,763.90 and 75,729.60

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Solution

The fourth proportional to 97,988.40, 146,763.90 and 75,729.60 is: 113,425.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,988.40 : 146,763.90 = 75,729.60 : x
  2. Step 2: Convert to fraction form
    97,988.40/146,763.90 = 75,729.60/x
  3. Step 3: Cross multiply
    97,988.40x = 146,763.90 × 75,729.60
  4. Step 4: Simplify right side
    97,988.40x = 11,114,371,441.44
  5. Step 5: Solve for x
    x = 11,114,371,441.44/97,988.40
  6. Step 6: Final answer
    x = 113,425.38

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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.