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Finding the Fourth Proportional to 56,656, 84,984.48 and 19,720

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Solution

The fourth proportional to 56,656, 84,984.48 and 19,720 is: 29,580.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,656 : 84,984.48 = 19,720 : x
  2. Step 2: Convert to fraction form
    56,656/84,984.48 = 19,720/x
  3. Step 3: Cross multiply
    56,656x = 84,984.48 × 19,720
  4. Step 4: Simplify right side
    56,656x = 1,675,893,945.60
  5. Step 5: Solve for x
    x = 1,675,893,945.60/56,656
  6. Step 6: Final answer
    x = 29,580.17

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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.