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Finding the Fourth Proportional to 81,172.89, 112,018.29 and 45,362.90

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Solution

The fourth proportional to 81,172.89, 112,018.29 and 45,362.90 is: 62,600.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,172.89 : 112,018.29 = 45,362.90 : x
  2. Step 2: Convert to fraction form
    81,172.89/112,018.29 = 45,362.90/x
  3. Step 3: Cross multiply
    81,172.89x = 112,018.29 × 45,362.90
  4. Step 4: Simplify right side
    81,172.89x = 5,081,473,927.35
  5. Step 5: Solve for x
    x = 5,081,473,927.35/81,172.89
  6. Step 6: Final answer
    x = 62,600.63

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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.