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Finding the Fourth Proportional to 129,580.96, 178,827.27 and 72,220.27

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Solution

The fourth proportional to 129,580.96, 178,827.27 and 72,220.27 is: 99,667.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,580.96 : 178,827.27 = 72,220.27 : x
  2. Step 2: Convert to fraction form
    129,580.96/178,827.27 = 72,220.27/x
  3. Step 3: Cross multiply
    129,580.96x = 178,827.27 × 72,220.27
  4. Step 4: Simplify right side
    129,580.96x = 12,914,953,722.76
  5. Step 5: Solve for x
    x = 12,914,953,722.76/129,580.96
  6. Step 6: Final answer
    x = 99,667.06

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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.