Home / 149,151.18-205,829.51-81,168.69

Finding the Fourth Proportional to 149,151.18, 205,829.51 and 81,168.69

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Solution

The fourth proportional to 149,151.18, 205,829.51 and 81,168.69 is: 112,013.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,151.18 : 205,829.51 = 81,168.69 : x
  2. Step 2: Convert to fraction form
    149,151.18/205,829.51 = 81,168.69/x
  3. Step 3: Cross multiply
    149,151.18x = 205,829.51 × 81,168.69
  4. Step 4: Simplify right side
    149,151.18x = 16,706,911,284.20
  5. Step 5: Solve for x
    x = 16,706,911,284.20/149,151.18
  6. Step 6: Final answer
    x = 112,013.27

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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.