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Finding the Fourth Proportional to 115,676.94, 159,572.46 and 70,368.78

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Solution

The fourth proportional to 115,676.94, 159,572.46 and 70,368.78 is: 97,071.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,676.94 : 159,572.46 = 70,368.78 : x
  2. Step 2: Convert to fraction form
    115,676.94/159,572.46 = 70,368.78/x
  3. Step 3: Cross multiply
    115,676.94x = 159,572.46 × 70,368.78
  4. Step 4: Simplify right side
    115,676.94x = 11,228,919,331.80
  5. Step 5: Solve for x
    x = 11,228,919,331.80/115,676.94
  6. Step 6: Final answer
    x = 97,071.37

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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.