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Finding the Fourth Proportional to 163,690, 245,534.30 and 45,361

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Solution

The fourth proportional to 163,690, 245,534.30 and 45,361 is: 68,041.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,690 : 245,534.30 = 45,361 : x
  2. Step 2: Convert to fraction form
    163,690/245,534.30 = 45,361/x
  3. Step 3: Cross multiply
    163,690x = 245,534.30 × 45,361
  4. Step 4: Simplify right side
    163,690x = 11,137,681,382.30
  5. Step 5: Solve for x
    x = 11,137,681,382.30/163,690
  6. Step 6: Final answer
    x = 68,041.31

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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.