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Finding the Fourth Proportional to 113,403.03, 156,487 and 65,659.40

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Solution

The fourth proportional to 113,403.03, 156,487 and 65,659.40 is: 90,604.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,403.03 : 156,487 = 65,659.40 : x
  2. Step 2: Convert to fraction form
    113,403.03/156,487 = 65,659.40/x
  3. Step 3: Cross multiply
    113,403.03x = 156,487 × 65,659.40
  4. Step 4: Simplify right side
    113,403.03x = 10,274,842,527.80
  5. Step 5: Solve for x
    x = 10,274,842,527.80/113,403.03
  6. Step 6: Final answer
    x = 90,604.66

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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.