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Finding the Fourth Proportional to 72,706.17, 100,384.26 and 55,680.39

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Solution

The fourth proportional to 72,706.17, 100,384.26 and 55,680.39 is: 76,877.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,706.17 : 100,384.26 = 55,680.39 : x
  2. Step 2: Convert to fraction form
    72,706.17/100,384.26 = 55,680.39/x
  3. Step 3: Cross multiply
    72,706.17x = 100,384.26 × 55,680.39
  4. Step 4: Simplify right side
    72,706.17x = 5,589,434,746.66
  5. Step 5: Solve for x
    x = 5,589,434,746.66/72,706.17
  6. Step 6: Final answer
    x = 76,877.03

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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.