Home / 78,281.21-108,028.29-42,471.51

Finding the Fourth Proportional to 78,281.21, 108,028.29 and 42,471.51

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Solution

The fourth proportional to 78,281.21, 108,028.29 and 42,471.51 is: 58,610.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,281.21 : 108,028.29 = 42,471.51 : x
  2. Step 2: Convert to fraction form
    78,281.21/108,028.29 = 42,471.51/x
  3. Step 3: Cross multiply
    78,281.21x = 108,028.29 × 42,471.51
  4. Step 4: Simplify right side
    78,281.21x = 4,588,124,599.02
  5. Step 5: Solve for x
    x = 4,588,124,599.02/78,281.21
  6. Step 6: Final answer
    x = 58,610.81

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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.