Home / 138,298,328.62-190,851,630.48-76,418,125.90

Finding the Fourth Proportional to 138,298,328.62, 190,851,630.48 and 76,418,125.90

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Solution

The fourth proportional to 138,298,328.62, 190,851,630.48 and 76,418,125.90 is: 105,456,978.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,298,328.62 : 190,851,630.48 = 76,418,125.90 : x
  2. Step 2: Convert to fraction form
    138,298,328.62/190,851,630.48 = 76,418,125.90/x
  3. Step 3: Cross multiply
    138,298,328.62x = 190,851,630.48 × 76,418,125.90
  4. Step 4: Simplify right side
    138,298,328.62x = 14,584,523,926,240,918
  5. Step 5: Solve for x
    x = 14,584,523,926,240,918/138,298,328.62
  6. Step 6: Final answer
    x = 105,456,978.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.