Home / 99,742.79-137,642.39-54,420.76

Finding the Fourth Proportional to 99,742.79, 137,642.39 and 54,420.76

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Solution

The fourth proportional to 99,742.79, 137,642.39 and 54,420.76 is: 75,099.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,742.79 : 137,642.39 = 54,420.76 : x
  2. Step 2: Convert to fraction form
    99,742.79/137,642.39 = 54,420.76/x
  3. Step 3: Cross multiply
    99,742.79x = 137,642.39 × 54,420.76
  4. Step 4: Simplify right side
    99,742.79x = 7,490,603,576.04
  5. Step 5: Solve for x
    x = 7,490,603,576.04/99,742.79
  6. Step 6: Final answer
    x = 75,099.20

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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.