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Finding the Fourth Proportional to 78,744.80, 118,041.60 and 26,127.20

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Solution

The fourth proportional to 78,744.80, 118,041.60 and 26,127.20 is: 39,165.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,744.80 : 118,041.60 = 26,127.20 : x
  2. Step 2: Convert to fraction form
    78,744.80/118,041.60 = 26,127.20/x
  3. Step 3: Cross multiply
    78,744.80x = 118,041.60 × 26,127.20
  4. Step 4: Simplify right side
    78,744.80x = 3,084,096,491.52
  5. Step 5: Solve for x
    x = 3,084,096,491.52/78,744.80
  6. Step 6: Final answer
    x = 39,165.72

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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.