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Finding the Fourth Proportional to 128,889,773.60, 193,166,698.80 and 52,149,984.80

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Solution

The fourth proportional to 128,889,773.60, 193,166,698.80 and 52,149,984.80 is: 78,157,018.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,889,773.60 : 193,166,698.80 = 52,149,984.80 : x
  2. Step 2: Convert to fraction form
    128,889,773.60/193,166,698.80 = 52,149,984.80/x
  3. Step 3: Cross multiply
    128,889,773.60x = 193,166,698.80 × 52,149,984.80
  4. Step 4: Simplify right side
    128,889,773.60x = 10,073,640,406,286,178
  5. Step 5: Solve for x
    x = 10,073,640,406,286,178/128,889,773.60
  6. Step 6: Final answer
    x = 78,157,018.40

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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.