Home / 149,838.40-206,779.98-81,858.10

Finding the Fourth Proportional to 149,838.40, 206,779.98 and 81,858.10

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Solution

The fourth proportional to 149,838.40, 206,779.98 and 81,858.10 is: 112,965.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,838.40 : 206,779.98 = 81,858.10 : x
  2. Step 2: Convert to fraction form
    149,838.40/206,779.98 = 81,858.10/x
  3. Step 3: Cross multiply
    149,838.40x = 206,779.98 × 81,858.10
  4. Step 4: Simplify right side
    149,838.40x = 16,926,616,280.84
  5. Step 5: Solve for x
    x = 16,926,616,280.84/149,838.40
  6. Step 6: Final answer
    x = 112,965.81

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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.