Home / 138,261.12-190,818.90-77,843.76

Finding the Fourth Proportional to 138,261.12, 190,818.90 and 77,843.76

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Solution

The fourth proportional to 138,261.12, 190,818.90 and 77,843.76 is: 107,434.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,261.12 : 190,818.90 = 77,843.76 : x
  2. Step 2: Convert to fraction form
    138,261.12/190,818.90 = 77,843.76/x
  3. Step 3: Cross multiply
    138,261.12x = 190,818.90 × 77,843.76
  4. Step 4: Simplify right side
    138,261.12x = 14,854,060,655.06
  5. Step 5: Solve for x
    x = 14,854,060,655.06/138,261.12
  6. Step 6: Final answer
    x = 107,434.84

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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.