Home / 142,783.10-197,042.04-79,122.26

Finding the Fourth Proportional to 142,783.10, 197,042.04 and 79,122.26

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Solution

The fourth proportional to 142,783.10, 197,042.04 and 79,122.26 is: 109,189.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,783.10 : 197,042.04 = 79,122.26 : x
  2. Step 2: Convert to fraction form
    142,783.10/197,042.04 = 79,122.26/x
  3. Step 3: Cross multiply
    142,783.10x = 197,042.04 × 79,122.26
  4. Step 4: Simplify right side
    142,783.10x = 15,590,411,519.81
  5. Step 5: Solve for x
    x = 15,590,411,519.81/142,783.10
  6. Step 6: Final answer
    x = 109,189.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.