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Finding the Fourth Proportional to 86,031.64, 118,736.58 and 61,912.45

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Solution

The fourth proportional to 86,031.64, 118,736.58 and 61,912.45 is: 85,448.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,031.64 : 118,736.58 = 61,912.45 : x
  2. Step 2: Convert to fraction form
    86,031.64/118,736.58 = 61,912.45/x
  3. Step 3: Cross multiply
    86,031.64x = 118,736.58 × 61,912.45
  4. Step 4: Simplify right side
    86,031.64x = 7,351,272,572.42
  5. Step 5: Solve for x
    x = 7,351,272,572.42/86,031.64
  6. Step 6: Final answer
    x = 85,448.48

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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.