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Finding the Fourth Proportional to 85,296.50, 127,916.21 and 28,357.28

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Solution

The fourth proportional to 85,296.50, 127,916.21 and 28,357.28 is: 42,526.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,296.50 : 127,916.21 = 28,357.28 : x
  2. Step 2: Convert to fraction form
    85,296.50/127,916.21 = 28,357.28/x
  3. Step 3: Cross multiply
    85,296.50x = 127,916.21 × 28,357.28
  4. Step 4: Simplify right side
    85,296.50x = 3,627,355,214.82
  5. Step 5: Solve for x
    x = 3,627,355,214.82/85,296.50
  6. Step 6: Final answer
    x = 42,526.43

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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.