Home / 115,101,205.90-172,651,808.85-78,821,500.30

Finding the Fourth Proportional to 115,101,205.90, 172,651,808.85 and 78,821,500.30

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Solution

The fourth proportional to 115,101,205.90, 172,651,808.85 and 78,821,500.30 is: 118,232,250.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,101,205.90 : 172,651,808.85 = 78,821,500.30 : x
  2. Step 2: Convert to fraction form
    115,101,205.90/172,651,808.85 = 78,821,500.30/x
  3. Step 3: Cross multiply
    115,101,205.90x = 172,651,808.85 × 78,821,500.30
  4. Step 4: Simplify right side
    115,101,205.90x = 13,608,674,603,065,816
  5. Step 5: Solve for x
    x = 13,608,674,603,065,816/115,101,205.90
  6. Step 6: Final answer
    x = 118,232,250.45

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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.