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Finding the Fourth Proportional to 118,722.64, 178,103.40 and 56,372.08

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Solution

The fourth proportional to 118,722.64, 178,103.40 and 56,372.08 is: 84,567.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,722.64 : 178,103.40 = 56,372.08 : x
  2. Step 2: Convert to fraction form
    118,722.64/178,103.40 = 56,372.08/x
  3. Step 3: Cross multiply
    118,722.64x = 178,103.40 × 56,372.08
  4. Step 4: Simplify right side
    118,722.64x = 10,040,059,113.07
  5. Step 5: Solve for x
    x = 10,040,059,113.07/118,722.64
  6. Step 6: Final answer
    x = 84,567.35

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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.