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Finding the Fourth Proportional to 129,117.60, 193,676.40 and 70,068.60

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Solution

The fourth proportional to 129,117.60, 193,676.40 and 70,068.60 is: 105,102.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,117.60 : 193,676.40 = 70,068.60 : x
  2. Step 2: Convert to fraction form
    129,117.60/193,676.40 = 70,068.60/x
  3. Step 3: Cross multiply
    129,117.60x = 193,676.40 × 70,068.60
  4. Step 4: Simplify right side
    129,117.60x = 13,570,634,201.04
  5. Step 5: Solve for x
    x = 13,570,634,201.04/129,117.60
  6. Step 6: Final answer
    x = 105,102.90

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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.