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Finding the Fourth Proportional to 127,872,469.60, 191,808,704.40 and 47,076,719.20

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Solution

The fourth proportional to 127,872,469.60, 191,808,704.40 and 47,076,719.20 is: 70,615,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,872,469.60 : 191,808,704.40 = 47,076,719.20 : x
  2. Step 2: Convert to fraction form
    127,872,469.60/191,808,704.40 = 47,076,719.20/x
  3. Step 3: Cross multiply
    127,872,469.60x = 191,808,704.40 × 47,076,719.20
  4. Step 4: Simplify right side
    127,872,469.60x = 9,029,724,517,154,606
  5. Step 5: Solve for x
    x = 9,029,724,517,154,606/127,872,469.60
  6. Step 6: Final answer
    x = 70,615,078.80

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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.