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Finding the Fourth Proportional to 56,721.79, 85,131.86 and 56,590.57

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Solution

The fourth proportional to 56,721.79, 85,131.86 and 56,590.57 is: 84,934.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,721.79 : 85,131.86 = 56,590.57 : x
  2. Step 2: Convert to fraction form
    56,721.79/85,131.86 = 56,590.57/x
  3. Step 3: Cross multiply
    56,721.79x = 85,131.86 × 56,590.57
  4. Step 4: Simplify right side
    56,721.79x = 4,817,660,482.56
  5. Step 5: Solve for x
    x = 4,817,660,482.56/56,721.79
  6. Step 6: Final answer
    x = 84,934.92

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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.