Home / 129,861,072-179,213,912.64-71,914,320

Finding the Fourth Proportional to 129,861,072, 179,213,912.64 and 71,914,320

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Solution

The fourth proportional to 129,861,072, 179,213,912.64 and 71,914,320 is: 99,244,881.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,861,072 : 179,213,912.64 = 71,914,320 : x
  2. Step 2: Convert to fraction form
    129,861,072/179,213,912.64 = 71,914,320/x
  3. Step 3: Cross multiply
    129,861,072x = 179,213,912.64 × 71,914,320
  4. Step 4: Simplify right side
    129,861,072x = 12,888,046,662,045,004
  5. Step 5: Solve for x
    x = 12,888,046,662,045,004/129,861,072
  6. Step 6: Final answer
    x = 99,244,881.19

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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.