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Finding the Fourth Proportional to 93,406.88, 128,912.64 and 53,126.72

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Solution

The fourth proportional to 93,406.88, 128,912.64 and 53,126.72 is: 73,321.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,406.88 : 128,912.64 = 53,126.72 : x
  2. Step 2: Convert to fraction form
    93,406.88/128,912.64 = 53,126.72/x
  3. Step 3: Cross multiply
    93,406.88x = 128,912.64 × 53,126.72
  4. Step 4: Simplify right side
    93,406.88x = 6,848,705,729.74
  5. Step 5: Solve for x
    x = 6,848,705,729.74/93,406.88
  6. Step 6: Final answer
    x = 73,321.21

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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.