Home / 256,645,987.20-385,063,459.20-84,128,428.80

Finding the Fourth Proportional to 256,645,987.20, 385,063,459.20 and 84,128,428.80

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Solution

The fourth proportional to 256,645,987.20, 385,063,459.20 and 84,128,428.80 is: 126,223,613.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,645,987.20 : 385,063,459.20 = 84,128,428.80 : x
  2. Step 2: Convert to fraction form
    256,645,987.20/385,063,459.20 = 84,128,428.80/x
  3. Step 3: Cross multiply
    256,645,987.20x = 385,063,459.20 × 84,128,428.80
  4. Step 4: Simplify right side
    256,645,987.20x = 32,394,783,810,788,904
  5. Step 5: Solve for x
    x = 32,394,783,810,788,904/256,645,987.20
  6. Step 6: Final answer
    x = 126,223,613.17

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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.