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Finding the Fourth Proportional to 85,676.88, 118,271.16 and 64,461.36

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Solution

The fourth proportional to 85,676.88, 118,271.16 and 64,461.36 is: 88,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,676.88 : 118,271.16 = 64,461.36 : x
  2. Step 2: Convert to fraction form
    85,676.88/118,271.16 = 64,461.36/x
  3. Step 3: Cross multiply
    85,676.88x = 118,271.16 × 64,461.36
  4. Step 4: Simplify right side
    85,676.88x = 7,623,919,822.38
  5. Step 5: Solve for x
    x = 7,623,919,822.38/85,676.88
  6. Step 6: Final answer
    x = 88,984.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.