Home / 138,164.13-190,666.49-78,548.13

Finding the Fourth Proportional to 138,164.13, 190,666.49 and 78,548.13

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Solution

The fourth proportional to 138,164.13, 190,666.49 and 78,548.13 is: 108,396.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,164.13 : 190,666.49 = 78,548.13 : x
  2. Step 2: Convert to fraction form
    138,164.13/190,666.49 = 78,548.13/x
  3. Step 3: Cross multiply
    138,164.13x = 190,666.49 × 78,548.13
  4. Step 4: Simplify right side
    138,164.13x = 14,976,496,243.16
  5. Step 5: Solve for x
    x = 14,976,496,243.16/138,164.13
  6. Step 6: Final answer
    x = 108,396.41

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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.