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Finding the Fourth Proportional to 78,783.96, 108,761.96 and 60,838.68

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Solution

The fourth proportional to 78,783.96, 108,761.96 and 60,838.68 is: 83,988.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,783.96 : 108,761.96 = 60,838.68 : x
  2. Step 2: Convert to fraction form
    78,783.96/108,761.96 = 60,838.68/x
  3. Step 3: Cross multiply
    78,783.96x = 108,761.96 × 60,838.68
  4. Step 4: Simplify right side
    78,783.96x = 6,616,934,080.61
  5. Step 5: Solve for x
    x = 6,616,934,080.61/78,783.96
  6. Step 6: Final answer
    x = 83,988.34

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1.5x scale

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.