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Finding the Fourth Proportional to 53,886.60, 80,720.55 and 30,485.70

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Solution

The fourth proportional to 53,886.60, 80,720.55 and 30,485.70 is: 45,666.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,886.60 : 80,720.55 = 30,485.70 : x
  2. Step 2: Convert to fraction form
    53,886.60/80,720.55 = 30,485.70/x
  3. Step 3: Cross multiply
    53,886.60x = 80,720.55 × 30,485.70
  4. Step 4: Simplify right side
    53,886.60x = 2,460,822,471.14
  5. Step 5: Solve for x
    x = 2,460,822,471.14/53,886.60
  6. Step 6: Final answer
    x = 45,666.69

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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.