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Finding the Fourth Proportional to 113,728.77, 156,894.94 and 65,954.43

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Solution

The fourth proportional to 113,728.77, 156,894.94 and 65,954.43 is: 90,987.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,728.77 : 156,894.94 = 65,954.43 : x
  2. Step 2: Convert to fraction form
    113,728.77/156,894.94 = 65,954.43/x
  3. Step 3: Cross multiply
    113,728.77x = 156,894.94 × 65,954.43
  4. Step 4: Simplify right side
    113,728.77x = 10,347,916,337.58
  5. Step 5: Solve for x
    x = 10,347,916,337.58/113,728.77
  6. Step 6: Final answer
    x = 90,987.67

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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.