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Finding the Fourth Proportional to 70,866.68, 106,300.15 and 66,536.42

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Solution

The fourth proportional to 70,866.68, 106,300.15 and 66,536.42 is: 99,804.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,866.68 : 106,300.15 = 66,536.42 : x
  2. Step 2: Convert to fraction form
    70,866.68/106,300.15 = 66,536.42/x
  3. Step 3: Cross multiply
    70,866.68x = 106,300.15 × 66,536.42
  4. Step 4: Simplify right side
    70,866.68x = 7,072,831,426.46
  5. Step 5: Solve for x
    x = 7,072,831,426.46/70,866.68
  6. Step 6: Final answer
    x = 99,804.75

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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.