Home / 138,154,660.48-190,670,149.60-78,630,429.08

Finding the Fourth Proportional to 138,154,660.48, 190,670,149.60 and 78,630,429.08

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Solution

The fourth proportional to 138,154,660.48, 190,670,149.60 and 78,630,429.08 is: 108,519,507.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154,660.48 : 190,670,149.60 = 78,630,429.08 : x
  2. Step 2: Convert to fraction form
    138,154,660.48/190,670,149.60 = 78,630,429.08/x
  3. Step 3: Cross multiply
    138,154,660.48x = 190,670,149.60 × 78,630,429.08
  4. Step 4: Simplify right side
    138,154,660.48x = 14,992,475,675,795,790
  5. Step 5: Solve for x
    x = 14,992,475,675,795,790/138,154,660.48
  6. Step 6: Final answer
    x = 108,519,507.22

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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.