Home / 115,985.70-160,137.36-89,080.13

Finding the Fourth Proportional to 115,985.70, 160,137.36 and 89,080.13

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Solution

The fourth proportional to 115,985.70, 160,137.36 and 89,080.13 is: 122,989.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,985.70 : 160,137.36 = 89,080.13 : x
  2. Step 2: Convert to fraction form
    115,985.70/160,137.36 = 89,080.13/x
  3. Step 3: Cross multiply
    115,985.70x = 160,137.36 × 89,080.13
  4. Step 4: Simplify right side
    115,985.70x = 14,265,056,045.97
  5. Step 5: Solve for x
    x = 14,265,056,045.97/115,985.70
  6. Step 6: Final answer
    x = 122,989.78

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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.