Home / 80,712,820.20-121,069,230.30-51,991,386.60

Finding the Fourth Proportional to 80,712,820.20, 121,069,230.30 and 51,991,386.60

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Solution

The fourth proportional to 80,712,820.20, 121,069,230.30 and 51,991,386.60 is: 77,987,079.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,712,820.20 : 121,069,230.30 = 51,991,386.60 : x
  2. Step 2: Convert to fraction form
    80,712,820.20/121,069,230.30 = 51,991,386.60/x
  3. Step 3: Cross multiply
    80,712,820.20x = 121,069,230.30 × 51,991,386.60
  4. Step 4: Simplify right side
    80,712,820.20x = 6,294,557,157,891,734
  5. Step 5: Solve for x
    x = 6,294,557,157,891,734/80,712,820.20
  6. Step 6: Final answer
    x = 77,987,079.90

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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.