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Finding the Fourth Proportional to 78,729.61, 108,642.93 and 44,733.61

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Solution

The fourth proportional to 78,729.61, 108,642.93 and 44,733.61 is: 61,730.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,729.61 : 108,642.93 = 44,733.61 : x
  2. Step 2: Convert to fraction form
    78,729.61/108,642.93 = 44,733.61/x
  3. Step 3: Cross multiply
    78,729.61x = 108,642.93 × 44,733.61
  4. Step 4: Simplify right side
    78,729.61x = 4,859,989,916.66
  5. Step 5: Solve for x
    x = 4,859,989,916.66/78,729.61
  6. Step 6: Final answer
    x = 61,730.14

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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.