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Finding the Fourth Proportional to 129,969, 179,357.76 and 70,353

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Solution

The fourth proportional to 129,969, 179,357.76 and 70,353 is: 97,087.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,969 : 179,357.76 = 70,353 : x
  2. Step 2: Convert to fraction form
    129,969/179,357.76 = 70,353/x
  3. Step 3: Cross multiply
    129,969x = 179,357.76 × 70,353
  4. Step 4: Simplify right side
    129,969x = 12,618,356,489.28
  5. Step 5: Solve for x
    x = 12,618,356,489.28/129,969
  6. Step 6: Final answer
    x = 97,087.43

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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.