Home / 85,780.54-118,417.82-57,147.92

Finding the Fourth Proportional to 85,780.54, 118,417.82 and 57,147.92

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Solution

The fourth proportional to 85,780.54, 118,417.82 and 57,147.92 is: 78,891.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,780.54 : 118,417.82 = 57,147.92 : x
  2. Step 2: Convert to fraction form
    85,780.54/118,417.82 = 57,147.92/x
  3. Step 3: Cross multiply
    85,780.54x = 118,417.82 × 57,147.92
  4. Step 4: Simplify right side
    85,780.54x = 6,767,331,226.11
  5. Step 5: Solve for x
    x = 6,767,331,226.11/85,780.54
  6. Step 6: Final answer
    x = 78,891.22

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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.