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Finding the Fourth Proportional to 131,495, 181,463.12 and 71,879

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Solution

The fourth proportional to 131,495, 181,463.12 and 71,879 is: 99,193.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,495 : 181,463.12 = 71,879 : x
  2. Step 2: Convert to fraction form
    131,495/181,463.12 = 71,879/x
  3. Step 3: Cross multiply
    131,495x = 181,463.12 × 71,879
  4. Step 4: Simplify right side
    131,495x = 13,043,387,602.48
  5. Step 5: Solve for x
    x = 13,043,387,602.48/131,495
  6. Step 6: Final answer
    x = 99,193.03

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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.