Home / 138,666.28-191,343.00-78,233.40

Finding the Fourth Proportional to 138,666.28, 191,343.00 and 78,233.40

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Solution

The fourth proportional to 138,666.28, 191,343.00 and 78,233.40 is: 107,952.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,666.28 : 191,343.00 = 78,233.40 : x
  2. Step 2: Convert to fraction form
    138,666.28/191,343.00 = 78,233.40/x
  3. Step 3: Cross multiply
    138,666.28x = 191,343.00 × 78,233.40
  4. Step 4: Simplify right side
    138,666.28x = 14,969,413,173.43
  5. Step 5: Solve for x
    x = 14,969,413,173.43/138,666.28
  6. Step 6: Final answer
    x = 107,952.80

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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.