Home / 138,652.06-191,339.40-74,989.84

Finding the Fourth Proportional to 138,652.06, 191,339.40 and 74,989.84

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Solution

The fourth proportional to 138,652.06, 191,339.40 and 74,989.84 is: 103,485.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,652.06 : 191,339.40 = 74,989.84 : x
  2. Step 2: Convert to fraction form
    138,652.06/191,339.40 = 74,989.84/x
  3. Step 3: Cross multiply
    138,652.06x = 191,339.40 × 74,989.84
  4. Step 4: Simplify right side
    138,652.06x = 14,348,510,991.70
  5. Step 5: Solve for x
    x = 14,348,510,991.70/138,652.06
  6. Step 6: Final answer
    x = 103,485.74

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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.