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Finding the Fourth Proportional to 121,840.56, 168,160.56 and 70,882.80

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Solution

The fourth proportional to 121,840.56, 168,160.56 and 70,882.80 is: 97,830.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,840.56 : 168,160.56 = 70,882.80 : x
  2. Step 2: Convert to fraction form
    121,840.56/168,160.56 = 70,882.80/x
  3. Step 3: Cross multiply
    121,840.56x = 168,160.56 × 70,882.80
  4. Step 4: Simplify right side
    121,840.56x = 11,919,691,342.37
  5. Step 5: Solve for x
    x = 11,919,691,342.37/121,840.56
  6. Step 6: Final answer
    x = 97,830.24

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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.