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Finding the Fourth Proportional to 111,645, 167,259.51 and 55,421.10

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Solution

The fourth proportional to 111,645, 167,259.51 and 55,421.10 is: 83,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,645 : 167,259.51 = 55,421.10 : x
  2. Step 2: Convert to fraction form
    111,645/167,259.51 = 55,421.10/x
  3. Step 3: Cross multiply
    111,645x = 167,259.51 × 55,421.10
  4. Step 4: Simplify right side
    111,645x = 9,269,706,029.66
  5. Step 5: Solve for x
    x = 9,269,706,029.66/111,645
  6. Step 6: Final answer
    x = 83,028.40

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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.