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Finding the Fourth Proportional to 102,562.58, 153,843.88 and 81,917.30

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Solution

The fourth proportional to 102,562.58, 153,843.88 and 81,917.30 is: 122,875.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,562.58 : 153,843.88 = 81,917.30 : x
  2. Step 2: Convert to fraction form
    102,562.58/153,843.88 = 81,917.30/x
  3. Step 3: Cross multiply
    102,562.58x = 153,843.88 × 81,917.30
  4. Step 4: Simplify right side
    102,562.58x = 12,602,475,271.12
  5. Step 5: Solve for x
    x = 12,602,475,271.12/102,562.58
  6. Step 6: Final answer
    x = 122,875.96

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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.