Home / 138,247.35-190,781.74-77,818.92

Finding the Fourth Proportional to 138,247.35, 190,781.74 and 77,818.92

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Solution

The fourth proportional to 138,247.35, 190,781.74 and 77,818.92 is: 107,390.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,247.35 : 190,781.74 = 77,818.92 : x
  2. Step 2: Convert to fraction form
    138,247.35/190,781.74 = 77,818.92/x
  3. Step 3: Cross multiply
    138,247.35x = 190,781.74 × 77,818.92
  4. Step 4: Simplify right side
    138,247.35x = 14,846,428,962.52
  5. Step 5: Solve for x
    x = 14,846,428,962.52/138,247.35
  6. Step 6: Final answer
    x = 107,390.33

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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.