Home / 142,779.34-197,032.55-79,115.78

Finding the Fourth Proportional to 142,779.34, 197,032.55 and 79,115.78

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Solution

The fourth proportional to 142,779.34, 197,032.55 and 79,115.78 is: 109,178.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,779.34 : 197,032.55 = 79,115.78 : x
  2. Step 2: Convert to fraction form
    142,779.34/197,032.55 = 79,115.78/x
  3. Step 3: Cross multiply
    142,779.34x = 197,032.55 × 79,115.78
  4. Step 4: Simplify right side
    142,779.34x = 15,588,383,878.64
  5. Step 5: Solve for x
    x = 15,588,383,878.64/142,779.34
  6. Step 6: Final answer
    x = 109,178.15

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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.