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Finding the Fourth Proportional to 117,960.51, 176,765.75 and 86,642.67

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Solution

The fourth proportional to 117,960.51, 176,765.75 and 86,642.67 is: 129,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,960.51 : 176,765.75 = 86,642.67 : x
  2. Step 2: Convert to fraction form
    117,960.51/176,765.75 = 86,642.67/x
  3. Step 3: Cross multiply
    117,960.51x = 176,765.75 × 86,642.67
  4. Step 4: Simplify right side
    117,960.51x = 15,315,456,111.34
  5. Step 5: Solve for x
    x = 15,315,456,111.34/117,960.51
  6. Step 6: Final answer
    x = 129,835.45

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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.