Home / 90,688.20-136,056.78-31,527.15

Finding the Fourth Proportional to 90,688.20, 136,056.78 and 31,527.15

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Solution

The fourth proportional to 90,688.20, 136,056.78 and 31,527.15 is: 47,299.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,688.20 : 136,056.78 = 31,527.15 : x
  2. Step 2: Convert to fraction form
    90,688.20/136,056.78 = 31,527.15/x
  3. Step 3: Cross multiply
    90,688.20x = 136,056.78 × 31,527.15
  4. Step 4: Simplify right side
    90,688.20x = 4,289,482,511.58
  5. Step 5: Solve for x
    x = 4,289,482,511.58/90,688.20
  6. Step 6: Final answer
    x = 47,299.24

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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.