Home / 260,493,246.78-390,656,911.79-85,575,678.73

Finding the Fourth Proportional to 260,493,246.78, 390,656,911.79 and 85,575,678.73

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Solution

The fourth proportional to 260,493,246.78, 390,656,911.79 and 85,575,678.73 is: 128,336,265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,493,246.78 : 390,656,911.79 = 85,575,678.73 : x
  2. Step 2: Convert to fraction form
    260,493,246.78/390,656,911.79 = 85,575,678.73/x
  3. Step 3: Cross multiply
    260,493,246.78x = 390,656,911.79 × 85,575,678.73
  4. Step 4: Simplify right side
    260,493,246.78x = 33,430,730,375,751,356
  5. Step 5: Solve for x
    x = 33,430,730,375,751,356/260,493,246.78
  6. Step 6: Final answer
    x = 128,336,265.10

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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.