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Finding the Fourth Proportional to 66,904.40, 100,356.60 and 17,656.40

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Solution

The fourth proportional to 66,904.40, 100,356.60 and 17,656.40 is: 26,484.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,904.40 : 100,356.60 = 17,656.40 : x
  2. Step 2: Convert to fraction form
    66,904.40/100,356.60 = 17,656.40/x
  3. Step 3: Cross multiply
    66,904.40x = 100,356.60 × 17,656.40
  4. Step 4: Simplify right side
    66,904.40x = 1,771,936,272.24
  5. Step 5: Solve for x
    x = 1,771,936,272.24/66,904.40
  6. Step 6: Final answer
    x = 26,484.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.