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Finding the Fourth Proportional to 145,796.80, 218,695.20 and 72,068.80

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Solution

The fourth proportional to 145,796.80, 218,695.20 and 72,068.80 is: 108,103.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,796.80 : 218,695.20 = 72,068.80 : x
  2. Step 2: Convert to fraction form
    145,796.80/218,695.20 = 72,068.80/x
  3. Step 3: Cross multiply
    145,796.80x = 218,695.20 × 72,068.80
  4. Step 4: Simplify right side
    145,796.80x = 15,761,100,629.76
  5. Step 5: Solve for x
    x = 15,761,100,629.76/145,796.80
  6. Step 6: Final answer
    x = 108,103.20

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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.