Home / 79,128.78-118,693.38-19,964.45

Finding the Fourth Proportional to 79,128.78, 118,693.38 and 19,964.45

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Solution

The fourth proportional to 79,128.78, 118,693.38 and 19,964.45 is: 29,946.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.78 : 118,693.38 = 19,964.45 : x
  2. Step 2: Convert to fraction form
    79,128.78/118,693.38 = 19,964.45/x
  3. Step 3: Cross multiply
    79,128.78x = 118,693.38 × 19,964.45
  4. Step 4: Simplify right side
    79,128.78x = 2,369,648,088.12
  5. Step 5: Solve for x
    x = 2,369,648,088.12/79,128.78
  6. Step 6: Final answer
    x = 29,946.73

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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.