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Finding the Fourth Proportional to 260,254,710.88, 390,382,978.79 and 66,166,146.97

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Solution

The fourth proportional to 260,254,710.88, 390,382,978.79 and 66,166,146.97 is: 99,249,452.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,254,710.88 : 390,382,978.79 = 66,166,146.97 : x
  2. Step 2: Convert to fraction form
    260,254,710.88/390,382,978.79 = 66,166,146.97/x
  3. Step 3: Cross multiply
    260,254,710.88x = 390,382,978.79 × 66,166,146.97
  4. Step 4: Simplify right side
    260,254,710.88x = 25,830,137,548,394,992
  5. Step 5: Solve for x
    x = 25,830,137,548,394,992/260,254,710.88
  6. Step 6: Final answer
    x = 99,249,452.44

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1.5x scale

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.