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Finding the Fourth Proportional to 115,978.03, 160,126.81 and 89,072.46

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Solution

The fourth proportional to 115,978.03, 160,126.81 and 89,072.46 is: 122,979.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,978.03 : 160,126.81 = 89,072.46 : x
  2. Step 2: Convert to fraction form
    115,978.03/160,126.81 = 89,072.46/x
  3. Step 3: Cross multiply
    115,978.03x = 160,126.81 × 89,072.46
  4. Step 4: Simplify right side
    115,978.03x = 14,262,888,655.97
  5. Step 5: Solve for x
    x = 14,262,888,655.97/115,978.03
  6. Step 6: Final answer
    x = 122,979.23

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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.