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Finding the Fourth Proportional to 76,389.40, 114,608.40 and 48,483.28

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Solution

The fourth proportional to 76,389.40, 114,608.40 and 48,483.28 is: 72,740.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,389.40 : 114,608.40 = 48,483.28 : x
  2. Step 2: Convert to fraction form
    76,389.40/114,608.40 = 48,483.28/x
  3. Step 3: Cross multiply
    76,389.40x = 114,608.40 × 48,483.28
  4. Step 4: Simplify right side
    76,389.40x = 5,556,591,147.55
  5. Step 5: Solve for x
    x = 5,556,591,147.55/76,389.40
  6. Step 6: Final answer
    x = 72,740.34

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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.