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Finding the Fourth Proportional to 111,985.40, 168,042.90 and 41,871.80

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Solution

The fourth proportional to 111,985.40, 168,042.90 and 41,871.80 is: 62,831.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,985.40 : 168,042.90 = 41,871.80 : x
  2. Step 2: Convert to fraction form
    111,985.40/168,042.90 = 41,871.80/x
  3. Step 3: Cross multiply
    111,985.40x = 168,042.90 × 41,871.80
  4. Step 4: Simplify right side
    111,985.40x = 7,036,258,700.22
  5. Step 5: Solve for x
    x = 7,036,258,700.22/111,985.40
  6. Step 6: Final answer
    x = 62,831.93

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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.