Home / 103,721.18-143,137.06-61,279.62

Finding the Fourth Proportional to 103,721.18, 143,137.06 and 61,279.62

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Solution

The fourth proportional to 103,721.18, 143,137.06 and 61,279.62 is: 84,566.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,721.18 : 143,137.06 = 61,279.62 : x
  2. Step 2: Convert to fraction form
    103,721.18/143,137.06 = 61,279.62/x
  3. Step 3: Cross multiply
    103,721.18x = 143,137.06 × 61,279.62
  4. Step 4: Simplify right side
    103,721.18x = 8,771,384,644.72
  5. Step 5: Solve for x
    x = 8,771,384,644.72/103,721.18
  6. Step 6: Final answer
    x = 84,566.96

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1.5x scale

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.