Home / 56,913.72-85,371.54-19,978.68

Finding the Fourth Proportional to 56,913.72, 85,371.54 and 19,978.68

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Solution

The fourth proportional to 56,913.72, 85,371.54 and 19,978.68 is: 29,968.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,913.72 : 85,371.54 = 19,978.68 : x
  2. Step 2: Convert to fraction form
    56,913.72/85,371.54 = 19,978.68/x
  3. Step 3: Cross multiply
    56,913.72x = 85,371.54 × 19,978.68
  4. Step 4: Simplify right side
    56,913.72x = 1,705,610,678.77
  5. Step 5: Solve for x
    x = 1,705,610,678.77/56,913.72
  6. Step 6: Final answer
    x = 29,968.36

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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.