Home / 130,921.79-180,692.60-77,212.72

Finding the Fourth Proportional to 130,921.79, 180,692.60 and 77,212.72

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Solution

The fourth proportional to 130,921.79, 180,692.60 and 77,212.72 is: 106,565.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,921.79 : 180,692.60 = 77,212.72 : x
  2. Step 2: Convert to fraction form
    130,921.79/180,692.60 = 77,212.72/x
  3. Step 3: Cross multiply
    130,921.79x = 180,692.60 × 77,212.72
  4. Step 4: Simplify right side
    130,921.79x = 13,951,766,292.08
  5. Step 5: Solve for x
    x = 13,951,766,292.08/130,921.79
  6. Step 6: Final answer
    x = 106,565.65

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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.