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Finding the Fourth Proportional to 115,041.05, 158,755.13 and 66,649.58

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Solution

The fourth proportional to 115,041.05, 158,755.13 and 66,649.58 is: 91,975.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,041.05 : 158,755.13 = 66,649.58 : x
  2. Step 2: Convert to fraction form
    115,041.05/158,755.13 = 66,649.58/x
  3. Step 3: Cross multiply
    115,041.05x = 158,755.13 × 66,649.58
  4. Step 4: Simplify right side
    115,041.05x = 10,580,961,943.57
  5. Step 5: Solve for x
    x = 10,580,961,943.57/115,041.05
  6. Step 6: Final answer
    x = 91,975.53

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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.