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Finding the Fourth Proportional to 70,871.68, 106,307.66 and 66,541.42

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Solution

The fourth proportional to 70,871.68, 106,307.66 and 66,541.42 is: 99,812.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,871.68 : 106,307.66 = 66,541.42 : x
  2. Step 2: Convert to fraction form
    70,871.68/106,307.66 = 66,541.42/x
  3. Step 3: Cross multiply
    70,871.68x = 106,307.66 × 66,541.42
  4. Step 4: Simplify right side
    70,871.68x = 7,073,862,653.28
  5. Step 5: Solve for x
    x = 7,073,862,653.28/70,871.68
  6. Step 6: Final answer
    x = 99,812.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.