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Finding the Fourth Proportional to 70,861, 97,779.62 and 40,644.76

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Solution

The fourth proportional to 70,861, 97,779.62 and 40,644.76 is: 56,084.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,861 : 97,779.62 = 40,644.76 : x
  2. Step 2: Convert to fraction form
    70,861/97,779.62 = 40,644.76/x
  3. Step 3: Cross multiply
    70,861x = 97,779.62 × 40,644.76
  4. Step 4: Simplify right side
    70,861x = 3,974,229,187.79
  5. Step 5: Solve for x
    x = 3,974,229,187.79/70,861
  6. Step 6: Final answer
    x = 56,084.86

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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.