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Finding the Fourth Proportional to 78,780.94, 108,757.83 and 60,835.66

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Solution

The fourth proportional to 78,780.94, 108,757.83 and 60,835.66 is: 83,984.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.94 : 108,757.83 = 60,835.66 : x
  2. Step 2: Convert to fraction form
    78,780.94/108,757.83 = 60,835.66/x
  3. Step 3: Cross multiply
    78,780.94x = 108,757.83 × 60,835.66
  4. Step 4: Simplify right side
    78,780.94x = 6,616,354,368.22
  5. Step 5: Solve for x
    x = 6,616,354,368.22/78,780.94
  6. Step 6: Final answer
    x = 83,984.20

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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.