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Finding the Fourth Proportional to 115,859.70, 159,899.82 and 70,564.22

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Solution

The fourth proportional to 115,859.70, 159,899.82 and 70,564.22 is: 97,386.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,859.70 : 159,899.82 = 70,564.22 : x
  2. Step 2: Convert to fraction form
    115,859.70/159,899.82 = 70,564.22/x
  3. Step 3: Cross multiply
    115,859.70x = 159,899.82 × 70,564.22
  4. Step 4: Simplify right side
    115,859.70x = 11,283,206,076.44
  5. Step 5: Solve for x
    x = 11,283,206,076.44/115,859.70
  6. Step 6: Final answer
    x = 97,386.81

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1.5x scale

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.