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Finding the Fourth Proportional to 78,875.70, 118,243.02 and 28,944.21

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Solution

The fourth proportional to 78,875.70, 118,243.02 and 28,944.21 is: 43,390.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,875.70 : 118,243.02 = 28,944.21 : x
  2. Step 2: Convert to fraction form
    78,875.70/118,243.02 = 28,944.21/x
  3. Step 3: Cross multiply
    78,875.70x = 118,243.02 × 28,944.21
  4. Step 4: Simplify right side
    78,875.70x = 3,422,450,801.91
  5. Step 5: Solve for x
    x = 3,422,450,801.91/78,875.70
  6. Step 6: Final answer
    x = 43,390.43

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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.