Home / 129,292,405.40-193,938,608.10-80,824,986.20

Finding the Fourth Proportional to 129,292,405.40, 193,938,608.10 and 80,824,986.20

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Solution

The fourth proportional to 129,292,405.40, 193,938,608.10 and 80,824,986.20 is: 121,237,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,292,405.40 : 193,938,608.10 = 80,824,986.20 : x
  2. Step 2: Convert to fraction form
    129,292,405.40/193,938,608.10 = 80,824,986.20/x
  3. Step 3: Cross multiply
    129,292,405.40x = 193,938,608.10 × 80,824,986.20
  4. Step 4: Simplify right side
    129,292,405.40x = 15,675,085,323,329,708
  5. Step 5: Solve for x
    x = 15,675,085,323,329,708/129,292,405.40
  6. Step 6: Final answer
    x = 121,237,479.30

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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.