Home / 120,605.51-180,916.95-31,857.86

Finding the Fourth Proportional to 120,605.51, 180,916.95 and 31,857.86

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Solution

The fourth proportional to 120,605.51, 180,916.95 and 31,857.86 is: 47,789.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,605.51 : 180,916.95 = 31,857.86 : x
  2. Step 2: Convert to fraction form
    120,605.51/180,916.95 = 31,857.86/x
  3. Step 3: Cross multiply
    120,605.51x = 180,916.95 × 31,857.86
  4. Step 4: Simplify right side
    120,605.51x = 5,763,625,960.14
  5. Step 5: Solve for x
    x = 5,763,625,960.14/120,605.51
  6. Step 6: Final answer
    x = 47,789.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.