Home / 138,154,627-190,670,103.87-78,630,396.34

Finding the Fourth Proportional to 138,154,627, 190,670,103.87 and 78,630,396.34

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Solution

The fourth proportional to 138,154,627, 190,670,103.87 and 78,630,396.34 is: 108,519,462.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154,627 : 190,670,103.87 = 78,630,396.34 : x
  2. Step 2: Convert to fraction form
    138,154,627/190,670,103.87 = 78,630,396.34/x
  3. Step 3: Cross multiply
    138,154,627x = 190,670,103.87 × 78,630,396.34
  4. Step 4: Simplify right side
    138,154,627x = 14,992,465,837,487,068
  5. Step 5: Solve for x
    x = 14,992,465,837,487,068/138,154,627
  6. Step 6: Final answer
    x = 108,519,462.31

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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.