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Finding the Fourth Proportional to 84,483.28, 126,748.86 and 42,312.43

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Solution

The fourth proportional to 84,483.28, 126,748.86 and 42,312.43 is: 63,480.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,483.28 : 126,748.86 = 42,312.43 : x
  2. Step 2: Convert to fraction form
    84,483.28/126,748.86 = 42,312.43/x
  3. Step 3: Cross multiply
    84,483.28x = 126,748.86 × 42,312.43
  4. Step 4: Simplify right side
    84,483.28x = 5,363,052,266.33
  5. Step 5: Solve for x
    x = 5,363,052,266.33/84,483.28
  6. Step 6: Final answer
    x = 63,480.64

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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.