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Finding the Fourth Proportional to 55,903.60, 83,709.60 and 53,279.20

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Solution

The fourth proportional to 55,903.60, 83,709.60 and 53,279.20 is: 79,779.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,903.60 : 83,709.60 = 53,279.20 : x
  2. Step 2: Convert to fraction form
    55,903.60/83,709.60 = 53,279.20/x
  3. Step 3: Cross multiply
    55,903.60x = 83,709.60 × 53,279.20
  4. Step 4: Simplify right side
    55,903.60x = 4,459,980,520.32
  5. Step 5: Solve for x
    x = 4,459,980,520.32/55,903.60
  6. Step 6: Final answer
    x = 79,779.84

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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.