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Finding the Fourth Proportional to 72,083.60, 108,125.40 and 40,979.60

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Solution

The fourth proportional to 72,083.60, 108,125.40 and 40,979.60 is: 61,469.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,083.60 : 108,125.40 = 40,979.60 : x
  2. Step 2: Convert to fraction form
    72,083.60/108,125.40 = 40,979.60/x
  3. Step 3: Cross multiply
    72,083.60x = 108,125.40 × 40,979.60
  4. Step 4: Simplify right side
    72,083.60x = 4,430,935,641.84
  5. Step 5: Solve for x
    x = 4,430,935,641.84/72,083.60
  6. Step 6: Final answer
    x = 61,469.40

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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.