Home / 138,433.32-191,016.36-78,000.84

Finding the Fourth Proportional to 138,433.32, 191,016.36 and 78,000.84

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Solution

The fourth proportional to 138,433.32, 191,016.36 and 78,000.84 is: 107,628.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,433.32 : 191,016.36 = 78,000.84 : x
  2. Step 2: Convert to fraction form
    138,433.32/191,016.36 = 78,000.84/x
  3. Step 3: Cross multiply
    138,433.32x = 191,016.36 × 78,000.84
  4. Step 4: Simplify right side
    138,433.32x = 14,899,436,533.74
  5. Step 5: Solve for x
    x = 14,899,436,533.74/138,433.32
  6. Step 6: Final answer
    x = 107,628.98

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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.