Home / 78,728,572.92-117,997,118.10-55,706,141.64

Finding the Fourth Proportional to 78,728,572.92, 117,997,118.10 and 55,706,141.64

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Solution

The fourth proportional to 78,728,572.92, 117,997,118.10 and 55,706,141.64 is: 83,491,468.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,728,572.92 : 117,997,118.10 = 55,706,141.64 : x
  2. Step 2: Convert to fraction form
    78,728,572.92/117,997,118.10 = 55,706,141.64/x
  3. Step 3: Cross multiply
    78,728,572.92x = 117,997,118.10 × 55,706,141.64
  4. Step 4: Simplify right side
    78,728,572.92x = 6,573,164,173,990,407
  5. Step 5: Solve for x
    x = 6,573,164,173,990,407/78,728,572.92
  6. Step 6: Final answer
    x = 83,491,468.60

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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.