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Finding the Fourth Proportional to 131,696, 181,740.48 and 72,080

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Solution

The fourth proportional to 131,696, 181,740.48 and 72,080 is: 99,470.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,696 : 181,740.48 = 72,080 : x
  2. Step 2: Convert to fraction form
    131,696/181,740.48 = 72,080/x
  3. Step 3: Cross multiply
    131,696x = 181,740.48 × 72,080
  4. Step 4: Simplify right side
    131,696x = 13,099,853,798.40
  5. Step 5: Solve for x
    x = 13,099,853,798.40/131,696
  6. Step 6: Final answer
    x = 99,470.40

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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.