Home / 126,029,385.60-189,044,078.40-80,642,428.80

Finding the Fourth Proportional to 126,029,385.60, 189,044,078.40 and 80,642,428.80

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Solution

The fourth proportional to 126,029,385.60, 189,044,078.40 and 80,642,428.80 is: 120,963,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,029,385.60 : 189,044,078.40 = 80,642,428.80 : x
  2. Step 2: Convert to fraction form
    126,029,385.60/189,044,078.40 = 80,642,428.80/x
  3. Step 3: Cross multiply
    126,029,385.60x = 189,044,078.40 × 80,642,428.80
  4. Step 4: Simplify right side
    126,029,385.60x = 15,244,973,632,433,618
  5. Step 5: Solve for x
    x = 15,244,973,632,433,618/126,029,385.60
  6. Step 6: Final answer
    x = 120,963,643.20

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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.