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Finding the Fourth Proportional to 121,266.50, 167,347.78 and 70,965.50

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Solution

The fourth proportional to 121,266.50, 167,347.78 and 70,965.50 is: 97,932.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,266.50 : 167,347.78 = 70,965.50 : x
  2. Step 2: Convert to fraction form
    121,266.50/167,347.78 = 70,965.50/x
  3. Step 3: Cross multiply
    121,266.50x = 167,347.78 × 70,965.50
  4. Step 4: Simplify right side
    121,266.50x = 11,875,918,881.59
  5. Step 5: Solve for x
    x = 11,875,918,881.59/121,266.50
  6. Step 6: Final answer
    x = 97,932.40

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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.