Home / 138,332.40-190,896.20-77,902.80

Finding the Fourth Proportional to 138,332.40, 190,896.20 and 77,902.80

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Solution

The fourth proportional to 138,332.40, 190,896.20 and 77,902.80 is: 107,504.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,332.40 : 190,896.20 = 77,902.80 : x
  2. Step 2: Convert to fraction form
    138,332.40/190,896.20 = 77,902.80/x
  3. Step 3: Cross multiply
    138,332.40x = 190,896.20 × 77,902.80
  4. Step 4: Simplify right side
    138,332.40x = 14,871,348,489.36
  5. Step 5: Solve for x
    x = 14,871,348,489.36/138,332.40
  6. Step 6: Final answer
    x = 107,504.45

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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.