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Finding the Fourth Proportional to 70,807.68, 97,715.04 and 38,975.76

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Solution

The fourth proportional to 70,807.68, 97,715.04 and 38,975.76 is: 53,786.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,807.68 : 97,715.04 = 38,975.76 : x
  2. Step 2: Convert to fraction form
    70,807.68/97,715.04 = 38,975.76/x
  3. Step 3: Cross multiply
    70,807.68x = 97,715.04 × 38,975.76
  4. Step 4: Simplify right side
    70,807.68x = 3,808,517,947.43
  5. Step 5: Solve for x
    x = 3,808,517,947.43/70,807.68
  6. Step 6: Final answer
    x = 53,786.79

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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.