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Finding the Fourth Proportional to 84,512.54, 126,584.55 and 42,319.03

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Solution

The fourth proportional to 84,512.54, 126,584.55 and 42,319.03 is: 63,386.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,512.54 : 126,584.55 = 42,319.03 : x
  2. Step 2: Convert to fraction form
    84,512.54/126,584.55 = 42,319.03/x
  3. Step 3: Cross multiply
    84,512.54x = 126,584.55 × 42,319.03
  4. Step 4: Simplify right side
    84,512.54x = 5,356,935,368.99
  5. Step 5: Solve for x
    x = 5,356,935,368.99/84,512.54
  6. Step 6: Final answer
    x = 63,386.28

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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.