Home / 72,837,559.80-109,256,339.70-66,885,420.60

Finding the Fourth Proportional to 72,837,559.80, 109,256,339.70 and 66,885,420.60

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Solution

The fourth proportional to 72,837,559.80, 109,256,339.70 and 66,885,420.60 is: 100,328,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,837,559.80 : 109,256,339.70 = 66,885,420.60 : x
  2. Step 2: Convert to fraction form
    72,837,559.80/109,256,339.70 = 66,885,420.60/x
  3. Step 3: Cross multiply
    72,837,559.80x = 109,256,339.70 × 66,885,420.60
  4. Step 4: Simplify right side
    72,837,559.80x = 7,307,656,234,050,978
  5. Step 5: Solve for x
    x = 7,307,656,234,050,978/72,837,559.80
  6. Step 6: Final answer
    x = 100,328,130.90

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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.