Home / 285,694,613.76-428,597,078.40-121,929,980.16

Finding the Fourth Proportional to 285,694,613.76, 428,597,078.40 and 121,929,980.16

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Solution

The fourth proportional to 285,694,613.76, 428,597,078.40 and 121,929,980.16 is: 182,918,510.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,694,613.76 : 428,597,078.40 = 121,929,980.16 : x
  2. Step 2: Convert to fraction form
    285,694,613.76/428,597,078.40 = 121,929,980.16/x
  3. Step 3: Cross multiply
    285,694,613.76x = 428,597,078.40 × 121,929,980.16
  4. Step 4: Simplify right side
    285,694,613.76x = 52,258,833,265,945,960
  5. Step 5: Solve for x
    x = 52,258,833,265,945,960/285,694,613.76
  6. Step 6: Final answer
    x = 182,918,510.71

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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.