Home / 85,656.09-128,631.15-52,570.44

Finding the Fourth Proportional to 85,656.09, 128,631.15 and 52,570.44

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Solution

The fourth proportional to 85,656.09, 128,631.15 and 52,570.44 is: 78,945.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,656.09 : 128,631.15 = 52,570.44 : x
  2. Step 2: Convert to fraction form
    85,656.09/128,631.15 = 52,570.44/x
  3. Step 3: Cross multiply
    85,656.09x = 128,631.15 × 52,570.44
  4. Step 4: Simplify right side
    85,656.09x = 6,762,196,153.21
  5. Step 5: Solve for x
    x = 6,762,196,153.21/85,656.09
  6. Step 6: Final answer
    x = 78,945.89

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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.