Home / 128,460,579.48-177,278,242.68-72,705,995.82

Finding the Fourth Proportional to 128,460,579.48, 177,278,242.68 and 72,705,995.82

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Solution

The fourth proportional to 128,460,579.48, 177,278,242.68 and 72,705,995.82 is: 100,335,770.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,460,579.48 : 177,278,242.68 = 72,705,995.82 : x
  2. Step 2: Convert to fraction form
    128,460,579.48/177,278,242.68 = 72,705,995.82/x
  3. Step 3: Cross multiply
    128,460,579.48x = 177,278,242.68 × 72,705,995.82
  4. Step 4: Simplify right side
    128,460,579.48x = 12,889,191,171,269,024
  5. Step 5: Solve for x
    x = 12,889,191,171,269,024/128,460,579.48
  6. Step 6: Final answer
    x = 100,335,770.11

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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.