Home / 149,130.72-205,794.12-81,147.96

Finding the Fourth Proportional to 149,130.72, 205,794.12 and 81,147.96

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Solution

The fourth proportional to 149,130.72, 205,794.12 and 81,147.96 is: 111,980.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,130.72 : 205,794.12 = 81,147.96 : x
  2. Step 2: Convert to fraction form
    149,130.72/205,794.12 = 81,147.96/x
  3. Step 3: Cross multiply
    149,130.72x = 205,794.12 × 81,147.96
  4. Step 4: Simplify right side
    149,130.72x = 16,699,773,018.00
  5. Step 5: Solve for x
    x = 16,699,773,018.00/149,130.72
  6. Step 6: Final answer
    x = 111,980.77

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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.