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Finding the Fourth Proportional to 70,865.68, 106,298.65 and 66,535.42

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Solution

The fourth proportional to 70,865.68, 106,298.65 and 66,535.42 is: 99,803.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,865.68 : 106,298.65 = 66,535.42 : x
  2. Step 2: Convert to fraction form
    70,865.68/106,298.65 = 66,535.42/x
  3. Step 3: Cross multiply
    70,865.68x = 106,298.65 × 66,535.42
  4. Step 4: Simplify right side
    70,865.68x = 7,072,624,459.01
  5. Step 5: Solve for x
    x = 7,072,624,459.01/70,865.68
  6. Step 6: Final answer
    x = 99,803.25

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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.