Home / 390,739,875.33-585,985,375.41-128,363,523.24

Finding the Fourth Proportional to 390,739,875.33, 585,985,375.41 and 128,363,523.24

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Solution

The fourth proportional to 390,739,875.33, 585,985,375.41 and 128,363,523.24 is: 192,504,405.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,739,875.33 : 585,985,375.41 = 128,363,523.24 : x
  2. Step 2: Convert to fraction form
    390,739,875.33/585,985,375.41 = 128,363,523.24/x
  3. Step 3: Cross multiply
    390,739,875.33x = 585,985,375.41 × 128,363,523.24
  4. Step 4: Simplify right side
    390,739,875.33x = 75,219,147,354,902,112
  5. Step 5: Solve for x
    x = 75,219,147,354,902,112/390,739,875.33
  6. Step 6: Final answer
    x = 192,504,405.37

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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.