Home / 138,807.45-191,554.73-75,145.10

Finding the Fourth Proportional to 138,807.45, 191,554.73 and 75,145.10

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Solution

The fourth proportional to 138,807.45, 191,554.73 and 75,145.10 is: 103,700.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,807.45 : 191,554.73 = 75,145.10 : x
  2. Step 2: Convert to fraction form
    138,807.45/191,554.73 = 75,145.10/x
  3. Step 3: Cross multiply
    138,807.45x = 191,554.73 × 75,145.10
  4. Step 4: Simplify right side
    138,807.45x = 14,394,398,007.82
  5. Step 5: Solve for x
    x = 14,394,398,007.82/138,807.45
  6. Step 6: Final answer
    x = 103,700.47

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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.