Home / 85,810,200.30-128,715,300.45-78,755,813.10

Finding the Fourth Proportional to 85,810,200.30, 128,715,300.45 and 78,755,813.10

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Solution

The fourth proportional to 85,810,200.30, 128,715,300.45 and 78,755,813.10 is: 118,133,719.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810,200.30 : 128,715,300.45 = 78,755,813.10 : x
  2. Step 2: Convert to fraction form
    85,810,200.30/128,715,300.45 = 78,755,813.10/x
  3. Step 3: Cross multiply
    85,810,200.30x = 128,715,300.45 × 78,755,813.10
  4. Step 4: Simplify right side
    85,810,200.30x = 10,137,078,145,350,546
  5. Step 5: Solve for x
    x = 10,137,078,145,350,546/85,810,200.30
  6. Step 6: Final answer
    x = 118,133,719.65

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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.