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Finding the Fourth Proportional to 103,779.52, 143,234.40 and 81,384.64

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Solution

The fourth proportional to 103,779.52, 143,234.40 and 81,384.64 is: 112,325.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,779.52 : 143,234.40 = 81,384.64 : x
  2. Step 2: Convert to fraction form
    103,779.52/143,234.40 = 81,384.64/x
  3. Step 3: Cross multiply
    103,779.52x = 143,234.40 × 81,384.64
  4. Step 4: Simplify right side
    103,779.52x = 11,657,080,079.62
  5. Step 5: Solve for x
    x = 11,657,080,079.62/103,779.52
  6. Step 6: Final answer
    x = 112,325.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.