Home / 129,276.96-178,401.36-72,688.80

Finding the Fourth Proportional to 129,276.96, 178,401.36 and 72,688.80

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Solution

The fourth proportional to 129,276.96, 178,401.36 and 72,688.80 is: 100,310.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,276.96 : 178,401.36 = 72,688.80 : x
  2. Step 2: Convert to fraction form
    129,276.96/178,401.36 = 72,688.80/x
  3. Step 3: Cross multiply
    129,276.96x = 178,401.36 × 72,688.80
  4. Step 4: Simplify right side
    129,276.96x = 12,967,780,776.77
  5. Step 5: Solve for x
    x = 12,967,780,776.77/129,276.96
  6. Step 6: Final answer
    x = 100,310.07

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1.5x scale

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.