Home / 42,015.78-57,985.86-31,386.96

Finding the Fourth Proportional to 42,015.78, 57,985.86 and 31,386.96

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Solution

The fourth proportional to 42,015.78, 57,985.86 and 31,386.96 is: 43,317.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,015.78 : 57,985.86 = 31,386.96 : x
  2. Step 2: Convert to fraction form
    42,015.78/57,985.86 = 31,386.96/x
  3. Step 3: Cross multiply
    42,015.78x = 57,985.86 × 31,386.96
  4. Step 4: Simplify right side
    42,015.78x = 1,819,999,868.39
  5. Step 5: Solve for x
    x = 1,819,999,868.39/42,015.78
  6. Step 6: Final answer
    x = 43,317.06

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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.