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Finding the Fourth Proportional to 105,526.80, 158,059.80 and 81,968.40

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Solution

The fourth proportional to 105,526.80, 158,059.80 and 81,968.40 is: 122,773.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,526.80 : 158,059.80 = 81,968.40 : x
  2. Step 2: Convert to fraction form
    105,526.80/158,059.80 = 81,968.40/x
  3. Step 3: Cross multiply
    105,526.80x = 158,059.80 × 81,968.40
  4. Step 4: Simplify right side
    105,526.80x = 12,955,908,910.32
  5. Step 5: Solve for x
    x = 12,955,908,910.32/105,526.80
  6. Step 6: Final answer
    x = 122,773.64

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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.