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Finding the Fourth Proportional to 84,671.96, 127,024.68 and 28,509.80

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Solution

The fourth proportional to 84,671.96, 127,024.68 and 28,509.80 is: 42,770.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,671.96 : 127,024.68 = 28,509.80 : x
  2. Step 2: Convert to fraction form
    84,671.96/127,024.68 = 28,509.80/x
  3. Step 3: Cross multiply
    84,671.96x = 127,024.68 × 28,509.80
  4. Step 4: Simplify right side
    84,671.96x = 3,621,448,221.86
  5. Step 5: Solve for x
    x = 3,621,448,221.86/84,671.96
  6. Step 6: Final answer
    x = 42,770.34

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1.5x scale

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.