Home / 78,339,390.40-117,509,085.60-71,643,233.80

Finding the Fourth Proportional to 78,339,390.40, 117,509,085.60 and 71,643,233.80

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Solution

The fourth proportional to 78,339,390.40, 117,509,085.60 and 71,643,233.80 is: 107,464,850.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,339,390.40 : 117,509,085.60 = 71,643,233.80 : x
  2. Step 2: Convert to fraction form
    78,339,390.40/117,509,085.60 = 71,643,233.80/x
  3. Step 3: Cross multiply
    78,339,390.40x = 117,509,085.60 × 71,643,233.80
  4. Step 4: Simplify right side
    78,339,390.40x = 8,418,730,893,265,013
  5. Step 5: Solve for x
    x = 8,418,730,893,265,013/78,339,390.40
  6. Step 6: Final answer
    x = 107,464,850.70

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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.