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Finding the Fourth Proportional to 84,548.58, 126,824.94 and 28,390.53

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Solution

The fourth proportional to 84,548.58, 126,824.94 and 28,390.53 is: 42,586.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,548.58 : 126,824.94 = 28,390.53 : x
  2. Step 2: Convert to fraction form
    84,548.58/126,824.94 = 28,390.53/x
  3. Step 3: Cross multiply
    84,548.58x = 126,824.94 × 28,390.53
  4. Step 4: Simplify right side
    84,548.58x = 3,600,627,263.82
  5. Step 5: Solve for x
    x = 3,600,627,263.82/84,548.58
  6. Step 6: Final answer
    x = 42,586.49

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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.