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Finding the Fourth Proportional to 131,783.66, 181,860.69 and 71,353.06

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Solution

The fourth proportional to 131,783.66, 181,860.69 and 71,353.06 is: 98,466.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,783.66 : 181,860.69 = 71,353.06 : x
  2. Step 2: Convert to fraction form
    131,783.66/181,860.69 = 71,353.06/x
  3. Step 3: Cross multiply
    131,783.66x = 181,860.69 × 71,353.06
  4. Step 4: Simplify right side
    131,783.66x = 12,976,316,270.56
  5. Step 5: Solve for x
    x = 12,976,316,270.56/131,783.66
  6. Step 6: Final answer
    x = 98,466.81

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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.