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Finding the Fourth Proportional to 158,663.65, 218,969.67 and 87,057.67

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Solution

The fourth proportional to 158,663.65, 218,969.67 and 87,057.67 is: 120,147.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,663.65 : 218,969.67 = 87,057.67 : x
  2. Step 2: Convert to fraction form
    158,663.65/218,969.67 = 87,057.67/x
  3. Step 3: Cross multiply
    158,663.65x = 218,969.67 × 87,057.67
  4. Step 4: Simplify right side
    158,663.65x = 19,062,989,270.87
  5. Step 5: Solve for x
    x = 19,062,989,270.87/158,663.65
  6. Step 6: Final answer
    x = 120,147.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.