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Finding the Fourth Proportional to 140,353.55, 193,892.80 and 121,457.87

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Solution

The fourth proportional to 140,353.55, 193,892.80 and 121,457.87 is: 167,789.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,353.55 : 193,892.80 = 121,457.87 : x
  2. Step 2: Convert to fraction form
    140,353.55/193,892.80 = 121,457.87/x
  3. Step 3: Cross multiply
    140,353.55x = 193,892.80 × 121,457.87
  4. Step 4: Simplify right side
    140,353.55x = 23,549,806,496.34
  5. Step 5: Solve for x
    x = 23,549,806,496.34/140,353.55
  6. Step 6: Final answer
    x = 167,789.18

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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.