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Finding the Fourth Proportional to 129,671, 178,946 and 70,055

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Solution

The fourth proportional to 129,671, 178,946 and 70,055 is: 96,675.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,671 : 178,946 = 70,055 : x
  2. Step 2: Convert to fraction form
    129,671/178,946 = 70,055/x
  3. Step 3: Cross multiply
    129,671x = 178,946 × 70,055
  4. Step 4: Simplify right side
    129,671x = 12,536,062,030
  5. Step 5: Solve for x
    x = 12,536,062,030/129,671
  6. Step 6: Final answer
    x = 96,675.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.