Home / 78,230,620.80-117,345,931.20-71,506,627.20

Finding the Fourth Proportional to 78,230,620.80, 117,345,931.20 and 71,506,627.20

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Solution

The fourth proportional to 78,230,620.80, 117,345,931.20 and 71,506,627.20 is: 107,259,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,230,620.80 : 117,345,931.20 = 71,506,627.20 : x
  2. Step 2: Convert to fraction form
    78,230,620.80/117,345,931.20 = 71,506,627.20/x
  3. Step 3: Cross multiply
    78,230,620.80x = 117,345,931.20 × 71,506,627.20
  4. Step 4: Simplify right side
    78,230,620.80x = 8,391,011,755,755,249
  5. Step 5: Solve for x
    x = 8,391,011,755,755,249/78,230,620.80
  6. Step 6: Final answer
    x = 107,259,940.80

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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.