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Finding the Fourth Proportional to 130,372, 179,913.52 and 70,756

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Solution

The fourth proportional to 130,372, 179,913.52 and 70,756 is: 97,643.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,372 : 179,913.52 = 70,756 : x
  2. Step 2: Convert to fraction form
    130,372/179,913.52 = 70,756/x
  3. Step 3: Cross multiply
    130,372x = 179,913.52 × 70,756
  4. Step 4: Simplify right side
    130,372x = 12,729,961,021.12
  5. Step 5: Solve for x
    x = 12,729,961,021.12/130,372
  6. Step 6: Final answer
    x = 97,643.37

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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.