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Finding the Fourth Proportional to 70,861.70, 97,789.13 and 39,030.59

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Solution

The fourth proportional to 70,861.70, 97,789.13 and 39,030.59 is: 53,862.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,861.70 : 97,789.13 = 39,030.59 : x
  2. Step 2: Convert to fraction form
    70,861.70/97,789.13 = 39,030.59/x
  3. Step 3: Cross multiply
    70,861.70x = 97,789.13 × 39,030.59
  4. Step 4: Simplify right side
    70,861.70x = 3,816,767,683.96
  5. Step 5: Solve for x
    x = 3,816,767,683.96/70,861.70
  6. Step 6: Final answer
    x = 53,862.21

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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.