Home / 78,600.56-108,465.39-42,790.73

Finding the Fourth Proportional to 78,600.56, 108,465.39 and 42,790.73

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Solution

The fourth proportional to 78,600.56, 108,465.39 and 42,790.73 is: 59,049.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,600.56 : 108,465.39 = 42,790.73 : x
  2. Step 2: Convert to fraction form
    78,600.56/108,465.39 = 42,790.73/x
  3. Step 3: Cross multiply
    78,600.56x = 108,465.39 × 42,790.73
  4. Step 4: Simplify right side
    78,600.56x = 4,641,312,675.51
  5. Step 5: Solve for x
    x = 4,641,312,675.51/78,600.56
  6. Step 6: Final answer
    x = 59,049.36

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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.