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Finding the Fourth Proportional to 213,079.02, 319,535.52 and 79,886.64

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Solution

The fourth proportional to 213,079.02, 319,535.52 and 79,886.64 is: 119,798.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,079.02 : 319,535.52 = 79,886.64 : x
  2. Step 2: Convert to fraction form
    213,079.02/319,535.52 = 79,886.64/x
  3. Step 3: Cross multiply
    213,079.02x = 319,535.52 × 79,886.64
  4. Step 4: Simplify right side
    213,079.02x = 25,526,619,053.45
  5. Step 5: Solve for x
    x = 25,526,619,053.45/213,079.02
  6. Step 6: Final answer
    x = 119,798.84

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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.