Home / 85,810,239.80-128,715,359.70-78,755,852.60

Finding the Fourth Proportional to 85,810,239.80, 128,715,359.70 and 78,755,852.60

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Solution

The fourth proportional to 85,810,239.80, 128,715,359.70 and 78,755,852.60 is: 118,133,778.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810,239.80 : 128,715,359.70 = 78,755,852.60 : x
  2. Step 2: Convert to fraction form
    85,810,239.80/128,715,359.70 = 78,755,852.60/x
  3. Step 3: Cross multiply
    85,810,239.80x = 128,715,359.70 × 78,755,852.60
  4. Step 4: Simplify right side
    85,810,239.80x = 10,137,087,895,889,180
  5. Step 5: Solve for x
    x = 10,137,087,895,889,180/85,810,239.80
  6. Step 6: Final answer
    x = 118,133,778.90

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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.