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Finding the Fourth Proportional to 56,791.80, 85,187.70 and 39,077.10

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Solution

The fourth proportional to 56,791.80, 85,187.70 and 39,077.10 is: 58,615.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,791.80 : 85,187.70 = 39,077.10 : x
  2. Step 2: Convert to fraction form
    56,791.80/85,187.70 = 39,077.10/x
  3. Step 3: Cross multiply
    56,791.80x = 85,187.70 × 39,077.10
  4. Step 4: Simplify right side
    56,791.80x = 3,328,888,271.67
  5. Step 5: Solve for x
    x = 3,328,888,271.67/56,791.80
  6. Step 6: Final answer
    x = 58,615.65

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1.5x scale

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.