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Finding the Fourth Proportional to 55,135.60, 82,703.40 and 52,985.20

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Solution

The fourth proportional to 55,135.60, 82,703.40 and 52,985.20 is: 79,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,135.60 : 82,703.40 = 52,985.20 : x
  2. Step 2: Convert to fraction form
    55,135.60/82,703.40 = 52,985.20/x
  3. Step 3: Cross multiply
    55,135.60x = 82,703.40 × 52,985.20
  4. Step 4: Simplify right side
    55,135.60x = 4,382,056,189.68
  5. Step 5: Solve for x
    x = 4,382,056,189.68/55,135.60
  6. Step 6: Final answer
    x = 79,477.80

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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.