Home / 72,199,782.40-108,288,052.80-21,069,817.60

Finding the Fourth Proportional to 72,199,782.40, 108,288,052.80 and 21,069,817.60

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Solution

The fourth proportional to 72,199,782.40, 108,288,052.80 and 21,069,817.60 is: 31,601,335.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,199,782.40 : 108,288,052.80 = 21,069,817.60 : x
  2. Step 2: Convert to fraction form
    72,199,782.40/108,288,052.80 = 21,069,817.60/x
  3. Step 3: Cross multiply
    72,199,782.40x = 108,288,052.80 × 21,069,817.60
  4. Step 4: Simplify right side
    72,199,782.40x = 2,281,609,520,755,169.50
  5. Step 5: Solve for x
    x = 2,281,609,520,755,169.50/72,199,782.40
  6. Step 6: Final answer
    x = 31,601,335.14

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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.