Home / 133,139.46-183,756.20-78,689.42

Finding the Fourth Proportional to 133,139.46, 183,756.20 and 78,689.42

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Solution

The fourth proportional to 133,139.46, 183,756.20 and 78,689.42 is: 108,605.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,139.46 : 183,756.20 = 78,689.42 : x
  2. Step 2: Convert to fraction form
    133,139.46/183,756.20 = 78,689.42/x
  3. Step 3: Cross multiply
    133,139.46x = 183,756.20 × 78,689.42
  4. Step 4: Simplify right side
    133,139.46x = 14,459,667,487.18
  5. Step 5: Solve for x
    x = 14,459,667,487.18/133,139.46
  6. Step 6: Final answer
    x = 108,605.42

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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.