Home / 138,154,625.50-190,670,101.80-78,630,394.84

Finding the Fourth Proportional to 138,154,625.50, 190,670,101.80 and 78,630,394.84

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Solution

The fourth proportional to 138,154,625.50, 190,670,101.80 and 78,630,394.84 is: 108,519,460.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154,625.50 : 190,670,101.80 = 78,630,394.84 : x
  2. Step 2: Convert to fraction form
    138,154,625.50/190,670,101.80 = 78,630,394.84/x
  3. Step 3: Cross multiply
    138,154,625.50x = 190,670,101.80 × 78,630,394.84
  4. Step 4: Simplify right side
    138,154,625.50x = 14,992,465,388,716,996
  5. Step 5: Solve for x
    x = 14,992,465,388,716,996/138,154,625.50
  6. Step 6: Final answer
    x = 108,519,460.24

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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.