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Finding the Fourth Proportional to 78,312.66, 108,071.42 and 44,320.52

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Solution

The fourth proportional to 78,312.66, 108,071.42 and 44,320.52 is: 61,162.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,312.66 : 108,071.42 = 44,320.52 : x
  2. Step 2: Convert to fraction form
    78,312.66/108,071.42 = 44,320.52/x
  3. Step 3: Cross multiply
    78,312.66x = 108,071.42 × 44,320.52
  4. Step 4: Simplify right side
    78,312.66x = 4,789,781,531.54
  5. Step 5: Solve for x
    x = 4,789,781,531.54/78,312.66
  6. Step 6: Final answer
    x = 61,162.29

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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.