Home / 138,156,429.83-190,672,593.45-78,632,199.32

Finding the Fourth Proportional to 138,156,429.83, 190,672,593.45 and 78,632,199.32

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Solution

The fourth proportional to 138,156,429.83, 190,672,593.45 and 78,632,199.32 is: 108,521,951.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,156,429.83 : 190,672,593.45 = 78,632,199.32 : x
  2. Step 2: Convert to fraction form
    138,156,429.83/190,672,593.45 = 78,632,199.32/x
  3. Step 3: Cross multiply
    138,156,429.83x = 190,672,593.45 × 78,632,199.32
  4. Step 4: Simplify right side
    138,156,429.83x = 14,993,005,373,021,724
  5. Step 5: Solve for x
    x = 14,993,005,373,021,724/138,156,429.83
  6. Step 6: Final answer
    x = 108,521,951.47

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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.