Home / 85,810,204.80-128,715,307.20-78,755,817.60

Finding the Fourth Proportional to 85,810,204.80, 128,715,307.20 and 78,755,817.60

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Solution

The fourth proportional to 85,810,204.80, 128,715,307.20 and 78,755,817.60 is: 118,133,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810,204.80 : 128,715,307.20 = 78,755,817.60 : x
  2. Step 2: Convert to fraction form
    85,810,204.80/128,715,307.20 = 78,755,817.60/x
  3. Step 3: Cross multiply
    85,810,204.80x = 128,715,307.20 × 78,755,817.60
  4. Step 4: Simplify right side
    85,810,204.80x = 10,137,079,256,171,166
  5. Step 5: Solve for x
    x = 10,137,079,256,171,166/85,810,204.80
  6. Step 6: Final answer
    x = 118,133,726.40

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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.