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Finding the Fourth Proportional to 77,515.20, 116,272.80 and 22,111.20

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Solution

The fourth proportional to 77,515.20, 116,272.80 and 22,111.20 is: 33,166.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,515.20 : 116,272.80 = 22,111.20 : x
  2. Step 2: Convert to fraction form
    77,515.20/116,272.80 = 22,111.20/x
  3. Step 3: Cross multiply
    77,515.20x = 116,272.80 × 22,111.20
  4. Step 4: Simplify right side
    77,515.20x = 2,570,931,135.36
  5. Step 5: Solve for x
    x = 2,570,931,135.36/77,515.20
  6. Step 6: Final answer
    x = 33,166.80

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1.5x scale

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.