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Finding the Fourth Proportional to 352,376.82, 528,560.63 and 86,139.67

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Solution

The fourth proportional to 352,376.82, 528,560.63 and 86,139.67 is: 129,208.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,376.82 : 528,560.63 = 86,139.67 : x
  2. Step 2: Convert to fraction form
    352,376.82/528,560.63 = 86,139.67/x
  3. Step 3: Cross multiply
    352,376.82x = 528,560.63 × 86,139.67
  4. Step 4: Simplify right side
    352,376.82x = 45,530,038,243.19
  5. Step 5: Solve for x
    x = 45,530,038,243.19/352,376.82
  6. Step 6: Final answer
    x = 129,208.38

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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.