Home / 78,338.31-108,109.08-42,530.66

Finding the Fourth Proportional to 78,338.31, 108,109.08 and 42,530.66

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Solution

The fourth proportional to 78,338.31, 108,109.08 and 42,530.66 is: 58,693.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,338.31 : 108,109.08 = 42,530.66 : x
  2. Step 2: Convert to fraction form
    78,338.31/108,109.08 = 42,530.66/x
  3. Step 3: Cross multiply
    78,338.31x = 108,109.08 × 42,530.66
  4. Step 4: Simplify right side
    78,338.31x = 4,597,950,524.39
  5. Step 5: Solve for x
    x = 4,597,950,524.39/78,338.31
  6. Step 6: Final answer
    x = 58,693.51

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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.