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Finding the Fourth Proportional to 86,013.66, 118,694.80 and 47,775.67

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Solution

The fourth proportional to 86,013.66, 118,694.80 and 47,775.67 is: 65,928.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,013.66 : 118,694.80 = 47,775.67 : x
  2. Step 2: Convert to fraction form
    86,013.66/118,694.80 = 47,775.67/x
  3. Step 3: Cross multiply
    86,013.66x = 118,694.80 × 47,775.67
  4. Step 4: Simplify right side
    86,013.66x = 5,670,724,026.16
  5. Step 5: Solve for x
    x = 5,670,724,026.16/86,013.66
  6. Step 6: Final answer
    x = 65,928.18

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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.