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Finding the Fourth Proportional to 86,659.70, 130,008.45 and 49,237.70

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Solution

The fourth proportional to 86,659.70, 130,008.45 and 49,237.70 is: 73,867.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,659.70 : 130,008.45 = 49,237.70 : x
  2. Step 2: Convert to fraction form
    86,659.70/130,008.45 = 49,237.70/x
  3. Step 3: Cross multiply
    86,659.70x = 130,008.45 × 49,237.70
  4. Step 4: Simplify right side
    86,659.70x = 6,401,317,058.57
  5. Step 5: Solve for x
    x = 6,401,317,058.57/86,659.70
  6. Step 6: Final answer
    x = 73,867.29

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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.