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Finding the Fourth Proportional to 81,142.68, 111,972.88 and 45,325.56

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Solution

The fourth proportional to 81,142.68, 111,972.88 and 45,325.56 is: 62,547.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,142.68 : 111,972.88 = 45,325.56 : x
  2. Step 2: Convert to fraction form
    81,142.68/111,972.88 = 45,325.56/x
  3. Step 3: Cross multiply
    81,142.68x = 111,972.88 × 45,325.56
  4. Step 4: Simplify right side
    81,142.68x = 5,075,233,490.81
  5. Step 5: Solve for x
    x = 5,075,233,490.81/81,142.68
  6. Step 6: Final answer
    x = 62,547.03

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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.