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Finding the Fourth Proportional to 86,138.48, 118,877.74 and 51,684.49

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Solution

The fourth proportional to 86,138.48, 118,877.74 and 51,684.49 is: 71,328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,138.48 : 118,877.74 = 51,684.49 : x
  2. Step 2: Convert to fraction form
    86,138.48/118,877.74 = 51,684.49/x
  3. Step 3: Cross multiply
    86,138.48x = 118,877.74 × 51,684.49
  4. Step 4: Simplify right side
    86,138.48x = 6,144,135,364.25
  5. Step 5: Solve for x
    x = 6,144,135,364.25/86,138.48
  6. Step 6: Final answer
    x = 71,328.58

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1.5x scale

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.