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Finding the Fourth Proportional to 111,873.60, 167,421.60 and 76,881.60

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Solution

The fourth proportional to 111,873.60, 167,421.60 and 76,881.60 is: 115,055.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,873.60 : 167,421.60 = 76,881.60 : x
  2. Step 2: Convert to fraction form
    111,873.60/167,421.60 = 76,881.60/x
  3. Step 3: Cross multiply
    111,873.60x = 167,421.60 × 76,881.60
  4. Step 4: Simplify right side
    111,873.60x = 12,871,640,482.56
  5. Step 5: Solve for x
    x = 12,871,640,482.56/111,873.60
  6. Step 6: Final answer
    x = 115,055.21

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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.