Home / 138,299,964.54-190,864,830.66-78,763,778.19

Finding the Fourth Proportional to 138,299,964.54, 190,864,830.66 and 78,763,778.19

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Solution

The fourth proportional to 138,299,964.54, 190,864,830.66 and 78,763,778.19 is: 108,700,209.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,299,964.54 : 190,864,830.66 = 78,763,778.19 : x
  2. Step 2: Convert to fraction form
    138,299,964.54/190,864,830.66 = 78,763,778.19/x
  3. Step 3: Cross multiply
    138,299,964.54x = 190,864,830.66 × 78,763,778.19
  4. Step 4: Simplify right side
    138,299,964.54x = 15,033,235,186,376,150
  5. Step 5: Solve for x
    x = 15,033,235,186,376,150/138,299,964.54
  6. Step 6: Final answer
    x = 108,700,209.98

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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.