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Finding the Fourth Proportional to 93,409.25, 128,907.60 and 53,128.80

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Solution

The fourth proportional to 93,409.25, 128,907.60 and 53,128.80 is: 73,319.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,409.25 : 128,907.60 = 53,128.80 : x
  2. Step 2: Convert to fraction form
    93,409.25/128,907.60 = 53,128.80/x
  3. Step 3: Cross multiply
    93,409.25x = 128,907.60 × 53,128.80
  4. Step 4: Simplify right side
    93,409.25x = 6,848,705,899.65
  5. Step 5: Solve for x
    x = 6,848,705,899.65/93,409.25
  6. Step 6: Final answer
    x = 73,319.36

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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.