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Finding the Fourth Proportional to 77,266.40, 115,899.60 and 72,017.60

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Solution

The fourth proportional to 77,266.40, 115,899.60 and 72,017.60 is: 108,026.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,266.40 : 115,899.60 = 72,017.60 : x
  2. Step 2: Convert to fraction form
    77,266.40/115,899.60 = 72,017.60/x
  3. Step 3: Cross multiply
    77,266.40x = 115,899.60 × 72,017.60
  4. Step 4: Simplify right side
    77,266.40x = 8,346,811,032.96
  5. Step 5: Solve for x
    x = 8,346,811,032.96/77,266.40
  6. Step 6: Final answer
    x = 108,026.40

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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.