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Finding the Fourth Proportional to 86,610, 129,906.60 and 58,709.36

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Solution

The fourth proportional to 86,610, 129,906.60 and 58,709.36 is: 88,058.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,610 : 129,906.60 = 58,709.36 : x
  2. Step 2: Convert to fraction form
    86,610/129,906.60 = 58,709.36/x
  3. Step 3: Cross multiply
    86,610x = 129,906.60 × 58,709.36
  4. Step 4: Simplify right side
    86,610x = 7,626,733,345.78
  5. Step 5: Solve for x
    x = 7,626,733,345.78/86,610
  6. Step 6: Final answer
    x = 88,058.35

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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.