Home / 42,768,103.20-64,154,612.40-12,480,640.80

Finding the Fourth Proportional to 42,768,103.20, 64,154,612.40 and 12,480,640.80

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Solution

The fourth proportional to 42,768,103.20, 64,154,612.40 and 12,480,640.80 is: 18,721,678.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,768,103.20 : 64,154,612.40 = 12,480,640.80 : x
  2. Step 2: Convert to fraction form
    42,768,103.20/64,154,612.40 = 12,480,640.80/x
  3. Step 3: Cross multiply
    42,768,103.20x = 64,154,612.40 × 12,480,640.80
  4. Step 4: Simplify right side
    42,768,103.20x = 800,690,673,027,626
  5. Step 5: Solve for x
    x = 800,690,673,027,626/42,768,103.20
  6. Step 6: Final answer
    x = 18,721,678.38

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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.