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Finding the Fourth Proportional to 76,440.64, 114,608.60 and 38,928.08

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Solution

The fourth proportional to 76,440.64, 114,608.60 and 38,928.08 is: 58,365.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,440.64 : 114,608.60 = 38,928.08 : x
  2. Step 2: Convert to fraction form
    76,440.64/114,608.60 = 38,928.08/x
  3. Step 3: Cross multiply
    76,440.64x = 114,608.60 × 38,928.08
  4. Step 4: Simplify right side
    76,440.64x = 4,461,492,749.49
  5. Step 5: Solve for x
    x = 4,461,492,749.49/76,440.64
  6. Step 6: Final answer
    x = 58,365.46

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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.