Home / 91,124.86-136,688.20-31,961.96

Finding the Fourth Proportional to 91,124.86, 136,688.20 and 31,961.96

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Solution

The fourth proportional to 91,124.86, 136,688.20 and 31,961.96 is: 47,943.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,124.86 : 136,688.20 = 31,961.96 : x
  2. Step 2: Convert to fraction form
    91,124.86/136,688.20 = 31,961.96/x
  3. Step 3: Cross multiply
    91,124.86x = 136,688.20 × 31,961.96
  4. Step 4: Simplify right side
    91,124.86x = 4,368,822,780.87
  5. Step 5: Solve for x
    x = 4,368,822,780.87/91,124.86
  6. Step 6: Final answer
    x = 47,943.26

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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.