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Finding the Fourth Proportional to 163,963.80, 245,945.70 and 75,390.30

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Solution

The fourth proportional to 163,963.80, 245,945.70 and 75,390.30 is: 113,085.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,963.80 : 245,945.70 = 75,390.30 : x
  2. Step 2: Convert to fraction form
    163,963.80/245,945.70 = 75,390.30/x
  3. Step 3: Cross multiply
    163,963.80x = 245,945.70 × 75,390.30
  4. Step 4: Simplify right side
    163,963.80x = 18,541,920,106.71
  5. Step 5: Solve for x
    x = 18,541,920,106.71/163,963.80
  6. Step 6: Final answer
    x = 113,085.45

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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.