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Finding the Fourth Proportional to 121,399.66, 167,543.77 and 70,427.98

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Solution

The fourth proportional to 121,399.66, 167,543.77 and 70,427.98 is: 97,197.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,399.66 : 167,543.77 = 70,427.98 : x
  2. Step 2: Convert to fraction form
    121,399.66/167,543.77 = 70,427.98/x
  3. Step 3: Cross multiply
    121,399.66x = 167,543.77 × 70,427.98
  4. Step 4: Simplify right side
    121,399.66x = 11,799,768,687.76
  5. Step 5: Solve for x
    x = 11,799,768,687.76/121,399.66
  6. Step 6: Final answer
    x = 97,197.71

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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.