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Finding the Fourth Proportional to 56,394.61, 77,647.03 and 47,879.89

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Solution

The fourth proportional to 56,394.61, 77,647.03 and 47,879.89 is: 65,923.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,394.61 : 77,647.03 = 47,879.89 : x
  2. Step 2: Convert to fraction form
    56,394.61/77,647.03 = 47,879.89/x
  3. Step 3: Cross multiply
    56,394.61x = 77,647.03 × 47,879.89
  4. Step 4: Simplify right side
    56,394.61x = 3,717,730,941.41
  5. Step 5: Solve for x
    x = 3,717,730,941.41/56,394.61
  6. Step 6: Final answer
    x = 65,923.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.