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Finding the Fourth Proportional to 71,430, 98,528.94 and 45,969.60

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Solution

The fourth proportional to 71,430, 98,528.94 and 45,969.60 is: 63,409.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,430 : 98,528.94 = 45,969.60 : x
  2. Step 2: Convert to fraction form
    71,430/98,528.94 = 45,969.60/x
  3. Step 3: Cross multiply
    71,430x = 98,528.94 × 45,969.60
  4. Step 4: Simplify right side
    71,430x = 4,529,335,960.22
  5. Step 5: Solve for x
    x = 4,529,335,960.22/71,430
  6. Step 6: Final answer
    x = 63,409.44

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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.