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Finding the Fourth Proportional to 78,349.61, 108,211.48 and 52,811.93

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Solution

The fourth proportional to 78,349.61, 108,211.48 and 52,811.93 is: 72,940.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,349.61 : 108,211.48 = 52,811.93 : x
  2. Step 2: Convert to fraction form
    78,349.61/108,211.48 = 52,811.93/x
  3. Step 3: Cross multiply
    78,349.61x = 108,211.48 × 52,811.93
  4. Step 4: Simplify right side
    78,349.61x = 5,714,856,433.87
  5. Step 5: Solve for x
    x = 5,714,856,433.87/78,349.61
  6. Step 6: Final answer
    x = 72,940.46

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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.