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Finding the Fourth Proportional to 74,689.60, 104,643.20 and 74,689.60

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Solution

The fourth proportional to 74,689.60, 104,643.20 and 74,689.60 is: 104,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.60 : 104,643.20 = 74,689.60 : x
  2. Step 2: Convert to fraction form
    74,689.60/104,643.20 = 74,689.60/x
  3. Step 3: Cross multiply
    74,689.60x = 104,643.20 × 74,689.60
  4. Step 4: Simplify right side
    74,689.60x = 7,815,758,750.72
  5. Step 5: Solve for x
    x = 7,815,758,750.72/74,689.60
  6. Step 6: Final answer
    x = 104,643.20

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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.