Home / 85,401.16-128,296.14-61,781.56

Finding the Fourth Proportional to 85,401.16, 128,296.14 and 61,781.56

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Solution

The fourth proportional to 85,401.16, 128,296.14 and 61,781.56 is: 92,812.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,401.16 : 128,296.14 = 61,781.56 : x
  2. Step 2: Convert to fraction form
    85,401.16/128,296.14 = 61,781.56/x
  3. Step 3: Cross multiply
    85,401.16x = 128,296.14 × 61,781.56
  4. Step 4: Simplify right side
    85,401.16x = 7,926,335,671.18
  5. Step 5: Solve for x
    x = 7,926,335,671.18/85,401.16
  6. Step 6: Final answer
    x = 92,812.97

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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.