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Finding the Fourth Proportional to 156,988.84, 235,609.80 and 72,842.80

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Solution

The fourth proportional to 156,988.84, 235,609.80 and 72,842.80 is: 109,322.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,988.84 : 235,609.80 = 72,842.80 : x
  2. Step 2: Convert to fraction form
    156,988.84/235,609.80 = 72,842.80/x
  3. Step 3: Cross multiply
    156,988.84x = 235,609.80 × 72,842.80
  4. Step 4: Simplify right side
    156,988.84x = 17,162,477,539.44
  5. Step 5: Solve for x
    x = 17,162,477,539.44/156,988.84
  6. Step 6: Final answer
    x = 109,322.91

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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.