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Finding the Fourth Proportional to 131,176.80, 181,050.88 and 83,420.92

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Solution

The fourth proportional to 131,176.80, 181,050.88 and 83,420.92 is: 115,137.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,176.80 : 181,050.88 = 83,420.92 : x
  2. Step 2: Convert to fraction form
    131,176.80/181,050.88 = 83,420.92/x
  3. Step 3: Cross multiply
    131,176.80x = 181,050.88 × 83,420.92
  4. Step 4: Simplify right side
    131,176.80x = 15,103,430,976.41
  5. Step 5: Solve for x
    x = 15,103,430,976.41/131,176.80
  6. Step 6: Final answer
    x = 115,137.97

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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.