Home / 129,292,406.40-193,938,609.60-80,824,987.20

Finding the Fourth Proportional to 129,292,406.40, 193,938,609.60 and 80,824,987.20

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Solution

The fourth proportional to 129,292,406.40, 193,938,609.60 and 80,824,987.20 is: 121,237,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,292,406.40 : 193,938,609.60 = 80,824,987.20 : x
  2. Step 2: Convert to fraction form
    129,292,406.40/193,938,609.60 = 80,824,987.20/x
  3. Step 3: Cross multiply
    129,292,406.40x = 193,938,609.60 × 80,824,987.20
  4. Step 4: Simplify right side
    129,292,406.40x = 15,675,085,638,505,798
  5. Step 5: Solve for x
    x = 15,675,085,638,505,798/129,292,406.40
  6. Step 6: Final answer
    x = 121,237,480.80

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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.