Home / 149,111.78-205,779.18-85,461.80

Finding the Fourth Proportional to 149,111.78, 205,779.18 and 85,461.80

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Solution

The fourth proportional to 149,111.78, 205,779.18 and 85,461.80 is: 117,940.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,111.78 : 205,779.18 = 85,461.80 : x
  2. Step 2: Convert to fraction form
    149,111.78/205,779.18 = 85,461.80/x
  3. Step 3: Cross multiply
    149,111.78x = 205,779.18 × 85,461.80
  4. Step 4: Simplify right side
    149,111.78x = 17,586,259,125.32
  5. Step 5: Solve for x
    x = 17,586,259,125.32/149,111.78
  6. Step 6: Final answer
    x = 117,940.11

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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.