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Finding the Fourth Proportional to 61,128, 84,329.91 and 43,238.34

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Solution

The fourth proportional to 61,128, 84,329.91 and 43,238.34 is: 59,650.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,128 : 84,329.91 = 43,238.34 : x
  2. Step 2: Convert to fraction form
    61,128/84,329.91 = 43,238.34/x
  3. Step 3: Cross multiply
    61,128x = 84,329.91 × 43,238.34
  4. Step 4: Simplify right side
    61,128x = 3,646,285,320.75
  5. Step 5: Solve for x
    x = 3,646,285,320.75/61,128
  6. Step 6: Final answer
    x = 59,650.00

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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.