Home / 430,857,557.10-646,377,132.60-139,701,979.80

Finding the Fourth Proportional to 430,857,557.10, 646,377,132.60 and 139,701,979.80

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Solution

The fourth proportional to 430,857,557.10, 646,377,132.60 and 139,701,979.80 is: 209,582,409.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,857,557.10 : 646,377,132.60 = 139,701,979.80 : x
  2. Step 2: Convert to fraction form
    430,857,557.10/646,377,132.60 = 139,701,979.80/x
  3. Step 3: Cross multiply
    430,857,557.10x = 646,377,132.60 × 139,701,979.80
  4. Step 4: Simplify right side
    430,857,557.10x = 90,300,165,121,667,136
  5. Step 5: Solve for x
    x = 90,300,165,121,667,136/430,857,557.10
  6. Step 6: Final answer
    x = 209,582,409.86

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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.