Home / 78,868,468.80-118,302,703.20-65,431,540.80

Finding the Fourth Proportional to 78,868,468.80, 118,302,703.20 and 65,431,540.80

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Solution

The fourth proportional to 78,868,468.80, 118,302,703.20 and 65,431,540.80 is: 98,147,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,868,468.80 : 118,302,703.20 = 65,431,540.80 : x
  2. Step 2: Convert to fraction form
    78,868,468.80/118,302,703.20 = 65,431,540.80/x
  3. Step 3: Cross multiply
    78,868,468.80x = 118,302,703.20 × 65,431,540.80
  4. Step 4: Simplify right side
    78,868,468.80x = 7,740,728,151,181,090
  5. Step 5: Solve for x
    x = 7,740,728,151,181,090/78,868,468.80
  6. Step 6: Final answer
    x = 98,147,311.20

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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.