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Finding the Fourth Proportional to 128,995,776, 178,014,173.04 and 71,049,024

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Solution

The fourth proportional to 128,995,776, 178,014,173.04 and 71,049,024 is: 98,047,654.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,995,776 : 178,014,173.04 = 71,049,024 : x
  2. Step 2: Convert to fraction form
    128,995,776/178,014,173.04 = 71,049,024/x
  3. Step 3: Cross multiply
    128,995,776x = 178,014,173.04 × 71,049,024
  4. Step 4: Simplify right side
    128,995,776x = 12,647,733,252,659,112
  5. Step 5: Solve for x
    x = 12,647,733,252,659,112/128,995,776
  6. Step 6: Final answer
    x = 98,047,654.31

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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.