Home / 138,807.09-191,539.59-80,654.76

Finding the Fourth Proportional to 138,807.09, 191,539.59 and 80,654.76

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Solution

The fourth proportional to 138,807.09, 191,539.59 and 80,654.76 is: 111,295.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,807.09 : 191,539.59 = 80,654.76 : x
  2. Step 2: Convert to fraction form
    138,807.09/191,539.59 = 80,654.76/x
  3. Step 3: Cross multiply
    138,807.09x = 191,539.59 × 80,654.76
  4. Step 4: Simplify right side
    138,807.09x = 15,448,579,898.20
  5. Step 5: Solve for x
    x = 15,448,579,898.20/138,807.09
  6. Step 6: Final answer
    x = 111,295.32

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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.