Home / 138,141.07-190,634.40-77,711.76

Finding the Fourth Proportional to 138,141.07, 190,634.40 and 77,711.76

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Solution

The fourth proportional to 138,141.07, 190,634.40 and 77,711.76 is: 107,242.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,141.07 : 190,634.40 = 77,711.76 : x
  2. Step 2: Convert to fraction form
    138,141.07/190,634.40 = 77,711.76/x
  3. Step 3: Cross multiply
    138,141.07x = 190,634.40 × 77,711.76
  4. Step 4: Simplify right side
    138,141.07x = 14,814,534,740.54
  5. Step 5: Solve for x
    x = 14,814,534,740.54/138,141.07
  6. Step 6: Final answer
    x = 107,242.07

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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.