Home / 149,139.02-205,812.24-81,155.98

Finding the Fourth Proportional to 149,139.02, 205,812.24 and 81,155.98

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Solution

The fourth proportional to 149,139.02, 205,812.24 and 81,155.98 is: 111,995.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,139.02 : 205,812.24 = 81,155.98 : x
  2. Step 2: Convert to fraction form
    149,139.02/205,812.24 = 81,155.98/x
  3. Step 3: Cross multiply
    149,139.02x = 205,812.24 × 81,155.98
  4. Step 4: Simplify right side
    149,139.02x = 16,702,894,033.20
  5. Step 5: Solve for x
    x = 16,702,894,033.20/149,139.02
  6. Step 6: Final answer
    x = 111,995.47

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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.