Home / 68,256.36-102,403.02-20,870.16

Finding the Fourth Proportional to 68,256.36, 102,403.02 and 20,870.16

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Solution

The fourth proportional to 68,256.36, 102,403.02 and 20,870.16 is: 31,310.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,256.36 : 102,403.02 = 20,870.16 : x
  2. Step 2: Convert to fraction form
    68,256.36/102,403.02 = 20,870.16/x
  3. Step 3: Cross multiply
    68,256.36x = 102,403.02 × 20,870.16
  4. Step 4: Simplify right side
    68,256.36x = 2,137,167,411.88
  5. Step 5: Solve for x
    x = 2,137,167,411.88/68,256.36
  6. Step 6: Final answer
    x = 31,310.89

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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.