Home / 127,780,509.60-191,670,764.40-81,864,007.20

Finding the Fourth Proportional to 127,780,509.60, 191,670,764.40 and 81,864,007.20

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Solution

The fourth proportional to 127,780,509.60, 191,670,764.40 and 81,864,007.20 is: 122,796,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,780,509.60 : 191,670,764.40 = 81,864,007.20 : x
  2. Step 2: Convert to fraction form
    127,780,509.60/191,670,764.40 = 81,864,007.20/x
  3. Step 3: Cross multiply
    127,780,509.60x = 191,670,764.40 × 81,864,007.20
  4. Step 4: Simplify right side
    127,780,509.60x = 15,690,936,836,871,104
  5. Step 5: Solve for x
    x = 15,690,936,836,871,104/127,780,509.60
  6. Step 6: Final answer
    x = 122,796,010.80

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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.