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Finding the Fourth Proportional to 92,002.60, 128,978.60 and 92,002.60

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Solution

The fourth proportional to 92,002.60, 128,978.60 and 92,002.60 is: 128,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,002.60 : 128,978.60 = 92,002.60 : x
  2. Step 2: Convert to fraction form
    92,002.60/128,978.60 = 92,002.60/x
  3. Step 3: Cross multiply
    92,002.60x = 128,978.60 × 92,002.60
  4. Step 4: Simplify right side
    92,002.60x = 11,866,366,544.36
  5. Step 5: Solve for x
    x = 11,866,366,544.36/92,002.60
  6. Step 6: Final answer
    x = 128,978.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.