Home / 68,276.47-102,433.29-20,890.51

Finding the Fourth Proportional to 68,276.47, 102,433.29 and 20,890.51

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Solution

The fourth proportional to 68,276.47, 102,433.29 and 20,890.51 is: 31,341.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,276.47 : 102,433.29 = 20,890.51 : x
  2. Step 2: Convert to fraction form
    68,276.47/102,433.29 = 20,890.51/x
  3. Step 3: Cross multiply
    68,276.47x = 102,433.29 × 20,890.51
  4. Step 4: Simplify right side
    68,276.47x = 2,139,883,669.08
  5. Step 5: Solve for x
    x = 2,139,883,669.08/68,276.47
  6. Step 6: Final answer
    x = 31,341.45

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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.