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Finding the Fourth Proportional to 130,647.78, 195,971.76 and 86,264.10

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Solution

The fourth proportional to 130,647.78, 195,971.76 and 86,264.10 is: 129,396.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,647.78 : 195,971.76 = 86,264.10 : x
  2. Step 2: Convert to fraction form
    130,647.78/195,971.76 = 86,264.10/x
  3. Step 3: Cross multiply
    130,647.78x = 195,971.76 × 86,264.10
  4. Step 4: Simplify right side
    130,647.78x = 16,905,327,501.82
  5. Step 5: Solve for x
    x = 16,905,327,501.82/130,647.78
  6. Step 6: Final answer
    x = 129,396.21

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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.