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Finding the Fourth Proportional to 65,880.49, 90,915.79 and 35,666.45

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Solution

The fourth proportional to 65,880.49, 90,915.79 and 35,666.45 is: 49,220.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,880.49 : 90,915.79 = 35,666.45 : x
  2. Step 2: Convert to fraction form
    65,880.49/90,915.79 = 35,666.45/x
  3. Step 3: Cross multiply
    65,880.49x = 90,915.79 × 35,666.45
  4. Step 4: Simplify right side
    65,880.49x = 3,242,643,698.32
  5. Step 5: Solve for x
    x = 3,242,643,698.32/65,880.49
  6. Step 6: Final answer
    x = 49,220.09

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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.