Home / 78,155,890.20-117,085,860.09-52,169,835.90

Finding the Fourth Proportional to 78,155,890.20, 117,085,860.09 and 52,169,835.90

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Solution

The fourth proportional to 78,155,890.20, 117,085,860.09 and 52,169,835.90 is: 78,155,978.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,155,890.20 : 117,085,860.09 = 52,169,835.90 : x
  2. Step 2: Convert to fraction form
    78,155,890.20/117,085,860.09 = 52,169,835.90/x
  3. Step 3: Cross multiply
    78,155,890.20x = 117,085,860.09 × 52,169,835.90
  4. Step 4: Simplify right side
    78,155,890.20x = 6,108,350,107,105,659
  5. Step 5: Solve for x
    x = 6,108,350,107,105,659/78,155,890.20
  6. Step 6: Final answer
    x = 78,155,978.92

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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.