Home / 120,211.28-165,835.70-77,783.48

Finding the Fourth Proportional to 120,211.28, 165,835.70 and 77,783.48

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Solution

The fourth proportional to 120,211.28, 165,835.70 and 77,783.48 is: 107,305.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,211.28 : 165,835.70 = 77,783.48 : x
  2. Step 2: Convert to fraction form
    120,211.28/165,835.70 = 77,783.48/x
  3. Step 3: Cross multiply
    120,211.28x = 165,835.70 × 77,783.48
  4. Step 4: Simplify right side
    120,211.28x = 12,899,277,854.24
  5. Step 5: Solve for x
    x = 12,899,277,854.24/120,211.28
  6. Step 6: Final answer
    x = 107,305.05

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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.