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Finding the Fourth Proportional to 86,458.78, 118,362.21 and 85,875.58

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Solution

The fourth proportional to 86,458.78, 118,362.21 and 85,875.58 is: 117,563.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,458.78 : 118,362.21 = 85,875.58 : x
  2. Step 2: Convert to fraction form
    86,458.78/118,362.21 = 85,875.58/x
  3. Step 3: Cross multiply
    86,458.78x = 118,362.21 × 85,875.58
  4. Step 4: Simplify right side
    86,458.78x = 10,164,423,433.83
  5. Step 5: Solve for x
    x = 10,164,423,433.83/86,458.78
  6. Step 6: Final answer
    x = 117,563.81

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1.5x scale

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.