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Finding the Fourth Proportional to 121,419.84, 167,645.68 and 101,328.64

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Solution

The fourth proportional to 121,419.84, 167,645.68 and 101,328.64 is: 139,905.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,419.84 : 167,645.68 = 101,328.64 : x
  2. Step 2: Convert to fraction form
    121,419.84/167,645.68 = 101,328.64/x
  3. Step 3: Cross multiply
    121,419.84x = 167,645.68 × 101,328.64
  4. Step 4: Simplify right side
    121,419.84x = 16,987,308,756.28
  5. Step 5: Solve for x
    x = 16,987,308,756.28/121,419.84
  6. Step 6: Final answer
    x = 139,905.54

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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.