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Finding the Fourth Proportional to 66,129.04, 91,259.69 and 35,915.64

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Solution

The fourth proportional to 66,129.04, 91,259.69 and 35,915.64 is: 49,564.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,129.04 : 91,259.69 = 35,915.64 : x
  2. Step 2: Convert to fraction form
    66,129.04/91,259.69 = 35,915.64/x
  3. Step 3: Cross multiply
    66,129.04x = 91,259.69 × 35,915.64
  4. Step 4: Simplify right side
    66,129.04x = 3,277,650,172.55
  5. Step 5: Solve for x
    x = 3,277,650,172.55/66,129.04
  6. Step 6: Final answer
    x = 49,564.46

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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.