Home / 78,785.76-108,725.82-42,977.07

Finding the Fourth Proportional to 78,785.76, 108,725.82 and 42,977.07

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Solution

The fourth proportional to 78,785.76, 108,725.82 and 42,977.07 is: 59,309.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,785.76 : 108,725.82 = 42,977.07 : x
  2. Step 2: Convert to fraction form
    78,785.76/108,725.82 = 42,977.07/x
  3. Step 3: Cross multiply
    78,785.76x = 108,725.82 × 42,977.07
  4. Step 4: Simplify right side
    78,785.76x = 4,672,717,176.95
  5. Step 5: Solve for x
    x = 4,672,717,176.95/78,785.76
  6. Step 6: Final answer
    x = 59,309.16

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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.