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Finding the Fourth Proportional to 131,985, 182,140.26 and 72,369

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Solution

The fourth proportional to 131,985, 182,140.26 and 72,369 is: 99,869.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,985 : 182,140.26 = 72,369 : x
  2. Step 2: Convert to fraction form
    131,985/182,140.26 = 72,369/x
  3. Step 3: Cross multiply
    131,985x = 182,140.26 × 72,369
  4. Step 4: Simplify right side
    131,985x = 13,181,308,475.94
  5. Step 5: Solve for x
    x = 13,181,308,475.94/131,985
  6. Step 6: Final answer
    x = 99,869.75

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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.