Home / 138,722.06-191,435.66-78,312.32

Finding the Fourth Proportional to 138,722.06, 191,435.66 and 78,312.32

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Solution

The fourth proportional to 138,722.06, 191,435.66 and 78,312.32 is: 108,070.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,722.06 : 191,435.66 = 78,312.32 : x
  2. Step 2: Convert to fraction form
    138,722.06/191,435.66 = 78,312.32/x
  3. Step 3: Cross multiply
    138,722.06x = 191,435.66 × 78,312.32
  4. Step 4: Simplify right side
    138,722.06x = 14,991,770,665.33
  5. Step 5: Solve for x
    x = 14,991,770,665.33/138,722.06
  6. Step 6: Final answer
    x = 108,070.56

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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.