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Finding the Fourth Proportional to 85,293.42, 127,968.43 and 26,129.67

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Solution

The fourth proportional to 85,293.42, 127,968.43 and 26,129.67 is: 39,203.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,293.42 : 127,968.43 = 26,129.67 : x
  2. Step 2: Convert to fraction form
    85,293.42/127,968.43 = 26,129.67/x
  3. Step 3: Cross multiply
    85,293.42x = 127,968.43 × 26,129.67
  4. Step 4: Simplify right side
    85,293.42x = 3,343,772,846.32
  5. Step 5: Solve for x
    x = 3,343,772,846.32/85,293.42
  6. Step 6: Final answer
    x = 39,203.17

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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.