Home / 128,725,872.80-193,088,809.20-74,306,314.40

Finding the Fourth Proportional to 128,725,872.80, 193,088,809.20 and 74,306,314.40

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Solution

The fourth proportional to 128,725,872.80, 193,088,809.20 and 74,306,314.40 is: 111,459,471.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,725,872.80 : 193,088,809.20 = 74,306,314.40 : x
  2. Step 2: Convert to fraction form
    128,725,872.80/193,088,809.20 = 74,306,314.40/x
  3. Step 3: Cross multiply
    128,725,872.80x = 193,088,809.20 × 74,306,314.40
  4. Step 4: Simplify right side
    128,725,872.80x = 14,347,717,763,536,812
  5. Step 5: Solve for x
    x = 14,347,717,763,536,812/128,725,872.80
  6. Step 6: Final answer
    x = 111,459,471.60

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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.