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Finding the Fourth Proportional to 78,610.37, 117,845.88 and 56,367.77

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Solution

The fourth proportional to 78,610.37, 117,845.88 and 56,367.77 is: 84,501.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,610.37 : 117,845.88 = 56,367.77 : x
  2. Step 2: Convert to fraction form
    78,610.37/117,845.88 = 56,367.77/x
  3. Step 3: Cross multiply
    78,610.37x = 117,845.88 × 56,367.77
  4. Step 4: Simplify right side
    78,610.37x = 6,642,709,459.29
  5. Step 5: Solve for x
    x = 6,642,709,459.29/78,610.37
  6. Step 6: Final answer
    x = 84,501.69

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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.