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Finding the Fourth Proportional to 93,415.93, 128,880.30 and 71,912.25

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Solution

The fourth proportional to 93,415.93, 128,880.30 and 71,912.25 is: 99,212.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,415.93 : 128,880.30 = 71,912.25 : x
  2. Step 2: Convert to fraction form
    93,415.93/128,880.30 = 71,912.25/x
  3. Step 3: Cross multiply
    93,415.93x = 128,880.30 × 71,912.25
  4. Step 4: Simplify right side
    93,415.93x = 9,268,072,353.68
  5. Step 5: Solve for x
    x = 9,268,072,353.68/93,415.93
  6. Step 6: Final answer
    x = 99,212.98

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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.