Home / 129,326.63-178,487.15-72,748.94

Finding the Fourth Proportional to 129,326.63, 178,487.15 and 72,748.94

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Solution

The fourth proportional to 129,326.63, 178,487.15 and 72,748.94 is: 100,402.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,326.63 : 178,487.15 = 72,748.94 : x
  2. Step 2: Convert to fraction form
    129,326.63/178,487.15 = 72,748.94/x
  3. Step 3: Cross multiply
    129,326.63x = 178,487.15 × 72,748.94
  4. Step 4: Simplify right side
    129,326.63x = 12,984,749,709.94
  5. Step 5: Solve for x
    x = 12,984,749,709.94/129,326.63
  6. Step 6: Final answer
    x = 100,402.76

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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.