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Finding the Fourth Proportional to 121,882.40, 168,270.36 and 76,598.72

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Solution

The fourth proportional to 121,882.40, 168,270.36 and 76,598.72 is: 105,751.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,882.40 : 168,270.36 = 76,598.72 : x
  2. Step 2: Convert to fraction form
    121,882.40/168,270.36 = 76,598.72/x
  3. Step 3: Cross multiply
    121,882.40x = 168,270.36 × 76,598.72
  4. Step 4: Simplify right side
    121,882.40x = 12,889,294,189.94
  5. Step 5: Solve for x
    x = 12,889,294,189.94/121,882.40
  6. Step 6: Final answer
    x = 105,751.89

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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.