Home / 85,677.10-128,552.10-54,111.40

Finding the Fourth Proportional to 85,677.10, 128,552.10 and 54,111.40

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Solution

The fourth proportional to 85,677.10, 128,552.10 and 54,111.40 is: 81,190.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,677.10 : 128,552.10 = 54,111.40 : x
  2. Step 2: Convert to fraction form
    85,677.10/128,552.10 = 54,111.40/x
  3. Step 3: Cross multiply
    85,677.10x = 128,552.10 × 54,111.40
  4. Step 4: Simplify right side
    85,677.10x = 6,956,134,103.94
  5. Step 5: Solve for x
    x = 6,956,134,103.94/85,677.10
  6. Step 6: Final answer
    x = 81,190.12

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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.