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Finding the Fourth Proportional to 78,783.69, 108,761.64 and 60,838.41

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Solution

The fourth proportional to 78,783.69, 108,761.64 and 60,838.41 is: 83,988.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,783.69 : 108,761.64 = 60,838.41 : x
  2. Step 2: Convert to fraction form
    78,783.69/108,761.64 = 60,838.41/x
  3. Step 3: Cross multiply
    78,783.69x = 108,761.64 × 60,838.41
  4. Step 4: Simplify right side
    78,783.69x = 6,616,885,246.59
  5. Step 5: Solve for x
    x = 6,616,885,246.59/78,783.69
  6. Step 6: Final answer
    x = 83,988.01

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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.