Home / 138,559.70-191,196.14-78,126.74

Finding the Fourth Proportional to 138,559.70, 191,196.14 and 78,126.74

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Solution

The fourth proportional to 138,559.70, 191,196.14 and 78,126.74 is: 107,805.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,559.70 : 191,196.14 = 78,126.74 : x
  2. Step 2: Convert to fraction form
    138,559.70/191,196.14 = 78,126.74/x
  3. Step 3: Cross multiply
    138,559.70x = 191,196.14 × 78,126.74
  4. Step 4: Simplify right side
    138,559.70x = 14,937,531,401.46
  5. Step 5: Solve for x
    x = 14,937,531,401.46/138,559.70
  6. Step 6: Final answer
    x = 107,805.74

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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.