Home / 120,829,588.80-180,945,784.80-80,220,206.40

Finding the Fourth Proportional to 120,829,588.80, 180,945,784.80 and 80,220,206.40

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Solution

The fourth proportional to 120,829,588.80, 180,945,784.80 and 80,220,206.40 is: 120,132,066.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,829,588.80 : 180,945,784.80 = 80,220,206.40 : x
  2. Step 2: Convert to fraction form
    120,829,588.80/180,945,784.80 = 80,220,206.40/x
  3. Step 3: Cross multiply
    120,829,588.80x = 180,945,784.80 × 80,220,206.40
  4. Step 4: Simplify right side
    120,829,588.80x = 14,515,508,203,865,984
  5. Step 5: Solve for x
    x = 14,515,508,203,865,984/120,829,588.80
  6. Step 6: Final answer
    x = 120,132,066.56

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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.