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Finding the Fourth Proportional to 86,673.70, 130,010.55 and 72,676.90

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Solution

The fourth proportional to 86,673.70, 130,010.55 and 72,676.90 is: 109,015.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,673.70 : 130,010.55 = 72,676.90 : x
  2. Step 2: Convert to fraction form
    86,673.70/130,010.55 = 72,676.90/x
  3. Step 3: Cross multiply
    86,673.70x = 130,010.55 × 72,676.90
  4. Step 4: Simplify right side
    86,673.70x = 9,448,763,741.30
  5. Step 5: Solve for x
    x = 9,448,763,741.30/86,673.70
  6. Step 6: Final answer
    x = 109,015.35

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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.