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Finding the Fourth Proportional to 65,880.98, 90,915.64 and 35,666.29

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Solution

The fourth proportional to 65,880.98, 90,915.64 and 35,666.29 is: 49,219.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,880.98 : 90,915.64 = 35,666.29 : x
  2. Step 2: Convert to fraction form
    65,880.98/90,915.64 = 35,666.29/x
  3. Step 3: Cross multiply
    65,880.98x = 90,915.64 × 35,666.29
  4. Step 4: Simplify right side
    65,880.98x = 3,242,623,581.78
  5. Step 5: Solve for x
    x = 3,242,623,581.78/65,880.98
  6. Step 6: Final answer
    x = 49,219.42

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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.