Home / 131,129.04-180,930.96-76,670.72

Finding the Fourth Proportional to 131,129.04, 180,930.96 and 76,670.72

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Solution

The fourth proportional to 131,129.04, 180,930.96 and 76,670.72 is: 105,789.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,129.04 : 180,930.96 = 76,670.72 : x
  2. Step 2: Convert to fraction form
    131,129.04/180,930.96 = 76,670.72/x
  3. Step 3: Cross multiply
    131,129.04x = 180,930.96 × 76,670.72
  4. Step 4: Simplify right side
    131,129.04x = 13,872,106,973.49
  5. Step 5: Solve for x
    x = 13,872,106,973.49/131,129.04
  6. Step 6: Final answer
    x = 105,789.74

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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.