Home / 138,770.09-191,500.63-77,517.12

Finding the Fourth Proportional to 138,770.09, 191,500.63 and 77,517.12

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Solution

The fourth proportional to 138,770.09, 191,500.63 and 77,517.12 is: 106,972.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,770.09 : 191,500.63 = 77,517.12 : x
  2. Step 2: Convert to fraction form
    138,770.09/191,500.63 = 77,517.12/x
  3. Step 3: Cross multiply
    138,770.09x = 191,500.63 × 77,517.12
  4. Step 4: Simplify right side
    138,770.09x = 14,844,577,315.79
  5. Step 5: Solve for x
    x = 14,844,577,315.79/138,770.09
  6. Step 6: Final answer
    x = 106,972.46

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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.