Home / 138,445.47-191,049.30-78,028.25

Finding the Fourth Proportional to 138,445.47, 191,049.30 and 78,028.25

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Solution

The fourth proportional to 138,445.47, 191,049.30 and 78,028.25 is: 107,675.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,445.47 : 191,049.30 = 78,028.25 : x
  2. Step 2: Convert to fraction form
    138,445.47/191,049.30 = 78,028.25/x
  3. Step 3: Cross multiply
    138,445.47x = 191,049.30 × 78,028.25
  4. Step 4: Simplify right side
    138,445.47x = 14,907,241,587.48
  5. Step 5: Solve for x
    x = 14,907,241,587.48/138,445.47
  6. Step 6: Final answer
    x = 107,675.91

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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.