Home / 79,238,431.40-118,857,647.10-72,435,986.60

Finding the Fourth Proportional to 79,238,431.40, 118,857,647.10 and 72,435,986.60

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Solution

The fourth proportional to 79,238,431.40, 118,857,647.10 and 72,435,986.60 is: 108,653,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,238,431.40 : 118,857,647.10 = 72,435,986.60 : x
  2. Step 2: Convert to fraction form
    79,238,431.40/118,857,647.10 = 72,435,986.60/x
  3. Step 3: Cross multiply
    79,238,431.40x = 118,857,647.10 × 72,435,986.60
  4. Step 4: Simplify right side
    79,238,431.40x = 8,609,570,932,643,128
  5. Step 5: Solve for x
    x = 8,609,570,932,643,128/79,238,431.40
  6. Step 6: Final answer
    x = 108,653,979.90

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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.