Home / 135,435.28-186,885.31-74,990.72

Finding the Fourth Proportional to 135,435.28, 186,885.31 and 74,990.72

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Solution

The fourth proportional to 135,435.28, 186,885.31 and 74,990.72 is: 103,478.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,435.28 : 186,885.31 = 74,990.72 : x
  2. Step 2: Convert to fraction form
    135,435.28/186,885.31 = 74,990.72/x
  3. Step 3: Cross multiply
    135,435.28x = 186,885.31 × 74,990.72
  4. Step 4: Simplify right side
    135,435.28x = 14,014,663,954.32
  5. Step 5: Solve for x
    x = 14,014,663,954.32/135,435.28
  6. Step 6: Final answer
    x = 103,478.68

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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.