Home / 85,757,659.17-128,299,755.49-66,178,966.71

Finding the Fourth Proportional to 85,757,659.17, 128,299,755.49 and 66,178,966.71

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Solution

The fourth proportional to 85,757,659.17, 128,299,755.49 and 66,178,966.71 is: 99,008,593.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,757,659.17 : 128,299,755.49 = 66,178,966.71 : x
  2. Step 2: Convert to fraction form
    85,757,659.17/128,299,755.49 = 66,178,966.71/x
  3. Step 3: Cross multiply
    85,757,659.17x = 128,299,755.49 × 66,178,966.71
  4. Step 4: Simplify right side
    85,757,659.17x = 8,490,745,247,473,849
  5. Step 5: Solve for x
    x = 8,490,745,247,473,849/85,757,659.17
  6. Step 6: Final answer
    x = 99,008,593.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.