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Finding the Fourth Proportional to 86,751.64, 118,847.90 and 83,513.67

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Solution

The fourth proportional to 86,751.64, 118,847.90 and 83,513.67 is: 114,411.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,751.64 : 118,847.90 = 83,513.67 : x
  2. Step 2: Convert to fraction form
    86,751.64/118,847.90 = 83,513.67/x
  3. Step 3: Cross multiply
    86,751.64x = 118,847.90 × 83,513.67
  4. Step 4: Simplify right side
    86,751.64x = 9,925,424,300.79
  5. Step 5: Solve for x
    x = 9,925,424,300.79/86,751.64
  6. Step 6: Final answer
    x = 114,411.95

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.