Home / 81,478,920.40-122,176,390.20-30,334,613.20

Finding the Fourth Proportional to 81,478,920.40, 122,176,390.20 and 30,334,613.20

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Solution

The fourth proportional to 81,478,920.40, 122,176,390.20 and 30,334,613.20 is: 45,486,286.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,478,920.40 : 122,176,390.20 = 30,334,613.20 : x
  2. Step 2: Convert to fraction form
    81,478,920.40/122,176,390.20 = 30,334,613.20/x
  3. Step 3: Cross multiply
    81,478,920.40x = 122,176,390.20 × 30,334,613.20
  4. Step 4: Simplify right side
    81,478,920.40x = 3,706,173,538,889,270.50
  5. Step 5: Solve for x
    x = 3,706,173,538,889,270.50/81,478,920.40
  6. Step 6: Final answer
    x = 45,486,286.77

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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.