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Finding the Fourth Proportional to 65,878.45, 98,916.09 and 64,894.30

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Solution

The fourth proportional to 65,878.45, 98,916.09 and 64,894.30 is: 97,438.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,878.45 : 98,916.09 = 64,894.30 : x
  2. Step 2: Convert to fraction form
    65,878.45/98,916.09 = 64,894.30/x
  3. Step 3: Cross multiply
    65,878.45x = 98,916.09 × 64,894.30
  4. Step 4: Simplify right side
    65,878.45x = 6,419,089,928.64
  5. Step 5: Solve for x
    x = 6,419,089,928.64/65,878.45
  6. Step 6: Final answer
    x = 97,438.39

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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.