Home / 55,788.78-76,990.29-30,638.28

Finding the Fourth Proportional to 55,788.78, 76,990.29 and 30,638.28

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Solution

The fourth proportional to 55,788.78, 76,990.29 and 30,638.28 is: 42,281.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,788.78 : 76,990.29 = 30,638.28 : x
  2. Step 2: Convert to fraction form
    55,788.78/76,990.29 = 30,638.28/x
  3. Step 3: Cross multiply
    55,788.78x = 76,990.29 × 30,638.28
  4. Step 4: Simplify right side
    55,788.78x = 2,358,850,062.30
  5. Step 5: Solve for x
    x = 2,358,850,062.30/55,788.78
  6. Step 6: Final answer
    x = 42,281.80

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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.