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Finding the Fourth Proportional to 74,643.90, 104,639.70 and 74,643.90

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Solution

The fourth proportional to 74,643.90, 104,639.70 and 74,643.90 is: 104,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,643.90 : 104,639.70 = 74,643.90 : x
  2. Step 2: Convert to fraction form
    74,643.90/104,639.70 = 74,643.90/x
  3. Step 3: Cross multiply
    74,643.90x = 104,639.70 × 74,643.90
  4. Step 4: Simplify right side
    74,643.90x = 7,810,715,302.83
  5. Step 5: Solve for x
    x = 7,810,715,302.83/74,643.90
  6. Step 6: Final answer
    x = 104,639.70

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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.