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Finding the Fourth Proportional to 129,481.84, 178,688.28 and 72,895.24

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Solution

The fourth proportional to 129,481.84, 178,688.28 and 72,895.24 is: 100,597.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,481.84 : 178,688.28 = 72,895.24 : x
  2. Step 2: Convert to fraction form
    129,481.84/178,688.28 = 72,895.24/x
  3. Step 3: Cross multiply
    129,481.84x = 178,688.28 × 72,895.24
  4. Step 4: Simplify right side
    129,481.84x = 13,025,525,055.79
  5. Step 5: Solve for x
    x = 13,025,525,055.79/129,481.84
  6. Step 6: Final answer
    x = 100,597.31

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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.