Home / 138,950.18-191,758.77-78,523.34

Finding the Fourth Proportional to 138,950.18, 191,758.77 and 78,523.34

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Solution

The fourth proportional to 138,950.18, 191,758.77 and 78,523.34 is: 108,366.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,950.18 : 191,758.77 = 78,523.34 : x
  2. Step 2: Convert to fraction form
    138,950.18/191,758.77 = 78,523.34/x
  3. Step 3: Cross multiply
    138,950.18x = 191,758.77 × 78,523.34
  4. Step 4: Simplify right side
    138,950.18x = 15,057,539,094.69
  5. Step 5: Solve for x
    x = 15,057,539,094.69/138,950.18
  6. Step 6: Final answer
    x = 108,366.46

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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.