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Finding the Fourth Proportional to 72,036.20, 107,916.60 and 38,745.20

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Solution

The fourth proportional to 72,036.20, 107,916.60 and 38,745.20 is: 58,043.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,036.20 : 107,916.60 = 38,745.20 : x
  2. Step 2: Convert to fraction form
    72,036.20/107,916.60 = 38,745.20/x
  3. Step 3: Cross multiply
    72,036.20x = 107,916.60 × 38,745.20
  4. Step 4: Simplify right side
    72,036.20x = 4,181,250,250.32
  5. Step 5: Solve for x
    x = 4,181,250,250.32/72,036.20
  6. Step 6: Final answer
    x = 58,043.74

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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.