Home / 85,810,244.80-128,715,367.20-78,755,857.60

Finding the Fourth Proportional to 85,810,244.80, 128,715,367.20 and 78,755,857.60

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Solution

The fourth proportional to 85,810,244.80, 128,715,367.20 and 78,755,857.60 is: 118,133,786.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810,244.80 : 128,715,367.20 = 78,755,857.60 : x
  2. Step 2: Convert to fraction form
    85,810,244.80/128,715,367.20 = 78,755,857.60/x
  3. Step 3: Cross multiply
    85,810,244.80x = 128,715,367.20 × 78,755,857.60
  4. Step 4: Simplify right side
    85,810,244.80x = 10,137,089,130,134,910
  5. Step 5: Solve for x
    x = 10,137,089,130,134,910/85,810,244.80
  6. Step 6: Final answer
    x = 118,133,786.40

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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.