Home / 78,192,002.80-117,288,004.20-72,145,385.20

Finding the Fourth Proportional to 78,192,002.80, 117,288,004.20 and 72,145,385.20

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Solution

The fourth proportional to 78,192,002.80, 117,288,004.20 and 72,145,385.20 is: 108,218,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,192,002.80 : 117,288,004.20 = 72,145,385.20 : x
  2. Step 2: Convert to fraction form
    78,192,002.80/117,288,004.20 = 72,145,385.20/x
  3. Step 3: Cross multiply
    78,192,002.80x = 117,288,004.20 × 72,145,385.20
  4. Step 4: Simplify right side
    78,192,002.80x = 8,461,788,242,348,218
  5. Step 5: Solve for x
    x = 8,461,788,242,348,218/78,192,002.80
  6. Step 6: Final answer
    x = 108,218,077.80

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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.