Home / 85,452,321.20-128,178,483.26-20,755,690.30

Finding the Fourth Proportional to 85,452,321.20, 128,178,483.26 and 20,755,690.30

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Solution

The fourth proportional to 85,452,321.20, 128,178,483.26 and 20,755,690.30 is: 31,133,535.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,452,321.20 : 128,178,483.26 = 20,755,690.30 : x
  2. Step 2: Convert to fraction form
    85,452,321.20/128,178,483.26 = 20,755,690.30/x
  3. Step 3: Cross multiply
    85,452,321.20x = 128,178,483.26 × 20,755,690.30
  4. Step 4: Simplify right side
    85,452,321.20x = 2,660,432,901,668,294.50
  5. Step 5: Solve for x
    x = 2,660,432,901,668,294.50/85,452,321.20
  6. Step 6: Final answer
    x = 31,133,535.80

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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.