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Finding the Fourth Proportional to 163,940.80, 245,878.80 and 79,700.80

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Solution

The fourth proportional to 163,940.80, 245,878.80 and 79,700.80 is: 119,535.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,940.80 : 245,878.80 = 79,700.80 : x
  2. Step 2: Convert to fraction form
    163,940.80/245,878.80 = 79,700.80/x
  3. Step 3: Cross multiply
    163,940.80x = 245,878.80 × 79,700.80
  4. Step 4: Simplify right side
    163,940.80x = 19,596,737,063.04
  5. Step 5: Solve for x
    x = 19,596,737,063.04/163,940.80
  6. Step 6: Final answer
    x = 119,535.45

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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.