Home / 129,308.10-193,709.95-72,977.81

Finding the Fourth Proportional to 129,308.10, 193,709.95 and 72,977.81

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Solution

The fourth proportional to 129,308.10, 193,709.95 and 72,977.81 is: 109,324.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,308.10 : 193,709.95 = 72,977.81 : x
  2. Step 2: Convert to fraction form
    129,308.10/193,709.95 = 72,977.81/x
  3. Step 3: Cross multiply
    129,308.10x = 193,709.95 × 72,977.81
  4. Step 4: Simplify right side
    129,308.10x = 14,136,527,926.21
  5. Step 5: Solve for x
    x = 14,136,527,926.21/129,308.10
  6. Step 6: Final answer
    x = 109,324.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.