Home / 102,120.21-140,930.69-56,802.87

Finding the Fourth Proportional to 102,120.21, 140,930.69 and 56,802.87

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Solution

The fourth proportional to 102,120.21, 140,930.69 and 56,802.87 is: 78,390.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,120.21 : 140,930.69 = 56,802.87 : x
  2. Step 2: Convert to fraction form
    102,120.21/140,930.69 = 56,802.87/x
  3. Step 3: Cross multiply
    102,120.21x = 140,930.69 × 56,802.87
  4. Step 4: Simplify right side
    102,120.21x = 8,005,267,379.07
  5. Step 5: Solve for x
    x = 8,005,267,379.07/102,120.21
  6. Step 6: Final answer
    x = 78,390.63

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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.