Home / 115,977.80-160,341.86-85,715.39

Finding the Fourth Proportional to 115,977.80, 160,341.86 and 85,715.39

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Solution

The fourth proportional to 115,977.80, 160,341.86 and 85,715.39 is: 118,503.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,977.80 : 160,341.86 = 85,715.39 : x
  2. Step 2: Convert to fraction form
    115,977.80/160,341.86 = 85,715.39/x
  3. Step 3: Cross multiply
    115,977.80x = 160,341.86 × 85,715.39
  4. Step 4: Simplify right side
    115,977.80x = 13,743,765,063.23
  5. Step 5: Solve for x
    x = 13,743,765,063.23/115,977.80
  6. Step 6: Final answer
    x = 118,503.41

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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.